Sounds to me like Greg B is one of those (ahem) people who feel it is their god-given right to talk on the phone no matter what is going on around them.

The doctor's office I'm working in has posted signs in the lobby "Please turn off your cell phone". This is not for any medical reason, it's due to the fact that we've had many assholes sit in the lobby and carry on loud conversations about things that no one else needs hear about. It is a distraction for the rest of the population and therefore not allowed. If you don't like it, tough shit. Wait outside.