I recall wayyy back in the good-ol' days....
I had a tiny plastic AK that made a clicking sound, and I do recall waving to a cop car while i was holding it in my other hand. He just waved back. No harm done..
I also had a cap gun. it had a plastic red cover that was really pissing me off, so I ripped it off and spray painted it black. I went out on the street and just started ripping away at the caps I had bought with my allowance money, and again, no harm done.
We now live in a society of fear, when if you bring anything that resembles a gun into public property, lil' old bitch next door will call the SWAT team down on you.