I'm with zoiDman on this one. LEOs can and will stop you if you are doing anything suspicious. Personally, I welcome the opportunity to share the knowledge of PVs with them. People talk about LEOs like they're not human or something. They live, breath, walk and talk just like the rest of us...the difference is that they have a very dangerous job to do which involves confrontation almost constantly.
If you think you'd be any different than they are after a few months on the job, I would offer you...just try it...if you dare. Most people are honestly too unconfrontational to do even a half .... job at law enforcement.
Treat them with respect and 99.9% of them will return that respect with due diligence. Treat them with disrespect, and they're usually practiced enough in the art of confrontation to show you what the word means.
Sorry, I just get tired of mealy-mouthed people acting like they know anything about what it's like being in law enforcement. Yes, there are a couple of jerks in the bunch...but I dare say even more jerks on the other side of the law enforcement fence.