Comment by degenerate

This problem isn't one born with the internet. Think about all those "WE BUY HOUSES 4 CASH" signs you see at stop lights. Why can't the city simply look up the phone number on them and convict the business owner for breaking advertisement laws? Because there is no proof he put the sign there. It could be the competition trying to frame him! Thus, the signs are simply thrown out... and he can put new ones out tomorrow.