Thing about “last resort”- people will often make brutal things to do look connected to things they are not connected to. “You pinned him to the floor?” “Well, he throws chairs at people!” failing to mention that the pinning to the floor was actually because he threw a pencil. Even if it is factually true that the kid sometimes throws chairs at people.
realsocialskills said: 
 
Yes, absolutely.
 
Another thing that can happen is that someone will be described as “he throws chairs at people!” even if he did that one time five years ago.
 
Or if another teacher *told* them that he threw chairs at people, and they don’t ask for details. And maybe what actually happened is that he picked up a chair one time, and they decided that meant he was going to throw it. Or he habitually throws chairs, but never actually at people.