But it's not likely..... they can't be transmitting on cell phone frequencies from their station anyways, as the transmission outside frequencies within their operating privileges would be a FCC violation that could get their station licenses revoked.
Yup. So they couldn't do so openly. These days, there are plenty of ways to do so anonymously. Given some of the cool tools out there in the Ham world for connecting radios, I wouldn't be at all surprised to find an Elmer who could do some interesting things with cell phones if they wanted to.
Yeah, I'm a ham, but I'd never put my callsign on