I added the "pissed off cop" bit because it is true, go search around if you don't think so. The rest of it shows what I think is a part of the problem. God forbid we express our opinions and try to have a discussion without someone making a meta-comment about hn itself as if they are above it all.
The problem isn't that you're expressing an opinion; it's that you're making an assertion that isn't falsifiable. Of course it's possible some police officer somewhere is going to act inappropriately. Now what?