FCC enforcement is lax on GMRS and the Ham bands. Every now and then a serious offender is hit with a fine. This is sad, but it is reality. It is best to ignore those unlicensed users who play on the bands (unless they become a very serious problem). Business are different, they stand a better chance of being fined. They tend to be more reasonable when educated about the risk of operating unlicensed. Presentation of the facts is important. As suggested, a polite education goes a long way. If they ignore the advice and continue and it is confirmed that they are not operating on a grandfathered business license, well, it probably makes sense to involve the FCC. Now if some joker gets on a public safety bands there is quite a rapid response in locating the offender. It makes sense. Enforcing the law to prevent someone from interfering with a fire department or police response is more important than the general public bands. There are exceptions. Interfering with E-communications during a disaster on any band should be swiftly taken care of. The funny thing is, I would not have known about the Sonic opening if I had not heard the transmissions.