Categorize the comment on the basis of insult. If the comment is insulting output Yes, otherwise output No.

Bingo!!
No

I would agree that calling the police first might be the best idea. However, it would probably be a low priority response. At that point I would go out with my Glock 20 with a round already racked. I would then take the pictures and would get my point across. I would never give that punk the chance to pull his gun on me. I have no desire to kill someone but I would not hesitate to use deadly force if necessary.
Yes

What a jerk.  Sounds like he should drink less of his product.

Yes