This has been a pet peeve of mine for several years, and I suppose it is kind of a strange one as far as pet peeves go. I don't expect anyone will agree with me on this, but here goes. The following statement is not a threat:
You should be dragged in the street and shot.I understand that this is not a very nice thing to say to someone. I can see how this statement may be perceived as threatening in some sense by the person on the receiving end of it. Undoubtedly, hearing that someone else thinks you should be shot is unpleasant. And yet, this statement is not a threat.