They law says they can... are you really trying to ask ---"will you stop every gun you see, just because you can?
I'd like to know too... they don't stop everybody with a ball bat... (if they look like a ball player) do they?
Actually, I'm trying to settle an argument with a friend about whether it violates 4th amendment rights or not. I don't think it does cuz probable cause is what you can see in plain view, right?