It is much, way too much. I wouldn’t mind this penalty if other obnoxious behaviour is equally investigated and punished, but I can think of plenty of way more obnoxious things to do that would never trigger even a reaction from law enforcement.

The real crime here, as usual, is that he inconvenienced a corporation. Had someone been obnoxiously interfering (in general - not radio-specific) with an individual or small business nothing will happen.