Yeah I agree with what you are saying. It suddenly makes an easy path for someone who is messed up in their head to justify it just for that one time or something like you said.

I remember having a conversation about this with someone back when I was 21 or so because that Dateline NBC show To Catch A Predator was on and we were even like WTF about some of the show. For instance in certain episodes the would usually let the guy walk back out of the house and then the cops would arrest him and sometimes the guy wasn't running or anything and the cops would just full on head tackle the guy to the ground like he had a machine gun or something. A lot of the stuff they were doing was sort of borderline in my opinion and then some of the stuff was just over the top aggressive instead of just calming putting him in hand cuffs and putting him in the cop car.