A police officer may stop anyone at any time to talk with them. That person has the right to either talk to the police or not. It is called a consensual encounter. A refusal to talk to the police, or to provide information, such as ID, cannot then be used to create a "reasonable suspicion" used to then turn the consensual encounter into an involuntary one. Likewise, without suspicion that a crime has been, or is about to be, committed, the police, absent any other probable cause, may not search you.
There may be some rare exceptions (I can't think of any...) that entirely legal activity may generate reasonable suspicion, but the vast majority of the time, it cannot be used as a basis for a involuntary police encounter.
You Tube is replete with many, many examples of police illegally detaining people who are either open carrying or photographing (sometimes both...) from a public place. We should, IMHO, applaud those that are willing to resist these intrusions on our Constitutional rights. And while some of those engaged in this type of "civil disobedience" (I use that term loosely since those activities engaged in are entirely legal...) may be perceived as "trouble makers" or just looking to "provoke" the police, and have a bit of a defiant attitude, I personally tend to give them a pass. Rosa Parks, stood up (or rather sat down) for her rights and was seen by many as just making trouble; Martin Luther was definitely a "trouble maker" and was, coincidentally, well armed during his campaign. The point being, is that those folks we admire for standing up for their rights are often view from their contemporaries as trouble makers.
I am very far from a "cop hater" but that doesn't mean that I will allow anyone to disregard my rights, nor that I will just assume that police have nothing but good intentions. I don't assume all cops think I am a criminal and will treat me as such, but I know from personal experience that some will. So, like a cop who assumes everyone they stop is potentially armed and dangerous, why is it so denigrated when a citizen takes a similar stance and assumes that all police are, at least initially, a danger to the free expression of their Constitutional rights and exercises those rights during such an interaction? It amazes me that there are some that will just seethe at the mouth when discussing Mayor Bloomberg's attempts to run roughshod over their Second Amendment rights, but will grant him all sorts of leeway over NYPD's use of the "Stop and Frisk" tactics Bloomie uses to trample the Fourth Amendment. Which, by the way, was recently rejected by a Judge. Per the New York Times:
The judge found that for much of the last decade, patrol officers had stopped innocent people without any objective reason to suspect them of wrongdoing. But her criticism went beyond the conduct of police officers.
“I also conclude that the city’s highest officials have turned a blind eye to the evidence that officers are conducting stops in a racially discriminatory manner,”
She also, again, IMHO, correctly identified why it was so important to address these types of unwarranted stops, and that is the gradual acceptance of the American public to these types of activities that will, much like demonizing gun rights and gun owners do, (and for which many here would rightly agree that we need to "stand up" and resist the "camel's nose under the tent...") create a public who becomes more and more accepting of these encroachments.
Judge Scheindlin’s decision grapples with the legacy of Terry v. Ohio, a 1968 ruling by the Supreme Court, which held that stopping and frisking was constitutionally permissible under certain conditions. But she said that changes to the way the New York Police Department employed the practice were needed to ensure that the street stops were carried out in a manner that “protects the rights and liberties of all New Yorkers, while still providing much needed police protection.”
The judge found that the New York police were too quick to deem as suspicious behavior what was perfectly innocent, in effect watering down the legal standard required for a stop.....
She noted that officers routinely stopped people partly on the basis of “furtive movements,” a category that officers have testified might encompass any of the following: being fidgety, changing directions, walking in a certain way, grabbing at a pocket or looking over one’s shoulder.
“If officers believe that the behavior described above constitutes furtive movement that justifies a stop, then it is no surprise that stops so rarely produce evidence of criminal activity,” Judge Scheindlin wrote.
She found that in their zeal to identify concealed weapons, officers sometimes stopped people on the grounds that the officer observed a bulge in the person’s pocket; often it turned out that the bulge was caused not by a gun but by a wallet.
“The outline of a commonly carried object such as a wallet or cellphone does not justify a stop or frisk, nor does feeling such an object during a frisk justify a search,” she ruled.
But the stops were not the end of the problem, Judge Scheindlin found. After officers stopped people, they often conducted frisks for weapons, or searched the subjects’ pockets for contraband, like drugs, without any legal grounds for doing so.
And to further illustrate a point made earlier in this thread, here is Bloomie's response to the decision:
The mayor said the judge did “not understand how policing works” and had misinterpreted what the Constitution allowed.
I guess that because she was a Judge and not a police officer, Bloomie thinks she doesn't understand how the police should perform their job either....sound familiar?
http://www.nytimes.com/2013/08/13/nyregion/stop-and-frisk-practice-violated-rights-judge-rules.html?pagewanted=1&_r=2&hpEdited to add link to NY Times story