It happens but from my experience it's one of those charges you really you have to work for. Most guys use discretion and look the other way unless you give them a reason to slap that charge on you. Think of it kinda like a bonus charge. If you're walking down the street minding your business and happen to get contacted for something minor you're probably ok. If you're walking down the street while selling meth/heroin and get contacted you probably stand a high probability of catching that charge on top of your drug charge. Kind of like the old, since repealed, litter bag in you car requirement. No one really ever carried one their car and very few tickets were issued. If you got one of those $50 tickets, you probably earned it for other reasons. Hope that makes sense.