Any way to block some one from seeing your post ?
Any way to block some one from replying to your post ?
Any way to block some one from liking your post ?
What does "blocking" do ?
Tired of reading all of these petty rants, raves, hijacks and smart @$$e$. 
I'll post the following example in hopes of avoiding it as one of "those" reply's
"Yeah, you could just stop coming to 2a" 
Seriously, that's why most sites have moderators. There's no way to block an individual from reading your posts or otherwise interacting with you. The Blocking feature just obscures their posts so you can more easily ignore them, but even that doesn't really work -- all that has to happen is for someone to quote that person, and you'll see the quoted post.
Moderators should have a set of rules and guidelines to objectively and fairly judge users based on their posts and the responses by other members. For example, if someone repeatedly receives the Stop-Jack emoticon from multiple users in multiple threads, they should be given a warning or two, then have their posting privileges suspended for a time. If they continue ignoring the hijack warnings after having privileges restored, then they should be banned for failing to respect the moderators.
I'm not going to get into why or who. All I can say is this isn't FB or Twitter. At least they give users more control over who can see and respond to their comments. Even then, it's not perfect. You can filter out a specific person from your view, but others still see them. That means you'll be reading one side of the conversation without seeing the blocked person's posts -- similar to here.
One of the problems that arises from these situations is, if the mods aren't proactive, then members tend to try and handle the "problem member" themselves. That's where many, if not most, of the topic derailments occur. Without the risk of being suspended, that person sees no incentive to stop the antagonistic behavior.
Free speech is one thing. Disruption and constant refusal to change their behavior (not their opinions) is another thing altogether.
Just my opinion. I know AH is going to troll me on this, so be prepared.