.............I am not sure what you mean by "nasty" and am even more confused over how someone could be sued for using QuickClot (or any other external hemosttic) appropriately and correctly. Under what legal theory would you suggest there exists a legal liability in such a situation?
As a disclaimer: I am a medical professional with a background in emergency medicne/trauma care, aeromedical and critical care. I have used QuickClot in a clinical setting, but have not used either Celox or Hemcon.
See my response above about being sued/charged. So long as one does not go beyond their training, they are OK, but for the normal Joe I can see an ambulance chaser trying to sue you for using QuickClot or the like. If it actually happens.......who knows, but there definitely remains the possibility.
QuickClot and other external hemostatic is designed for use by the lay public with minimal training. The good Samaritan Laws generally have two exclusioins for indeminification. The first is training, so in general don't do anything you are not trained to do. Reading the instructions on an over-the-counter product should suffice to satisify this requirement.
The second is negligence. And, in Hawaii statue it is "gross negligence" not just simple negligence. Gross negligence is a relitively high bar to overcome.
Don't get me wrong, I would never encourage anyone to perform a procedure they were not trained in or use a product that they were not familar with. But, the Good Samaritan laws were intended to allow lay and non-obligated responders to respond to a person in need without having to worry about subsequent litigation because of minor errors or acts of ommission. CPR is a good example - Even if you have not been "trained" you could probably do an adequate job of performing CPR if you needed to. Granted CPR is a relatively simple procedure and as the complexity of any procedure increases the need for adequate training increases. But, in general, if you have training and don't act with "gross negligence or wanton disregard" in providing any needed care, you should be protected by the Good Samaritan laws.