So what is the legal term for a wrongful interaction that has a substantial possibility of serious harm or lethality to an innocent person? I mean, are we talking criminal negligence, wanton endangerment, what? The TSO could have *KILLED* the OP, due to his own ignorance of what he was REQUIRED to do.

I've heard it said, repeatedly, that "Ignorance of the law is no excuse." This should, in a country like ours, apply to agents of the State AT LEAST as much as to us lowly little peons.