Actually, the big issue here is that the radio station took disciplinary action against the DJs, instead of standing behind them. Usually the type of DJs that would do Apr 1 pranks are on the edgy side, and are hired for their edginess. So they were just doing their job. If I were in this station's listening area, I would be on the phone with their advertisers to let them know in no small way that I dis-approve of the action the station took.
Broadcast radio is basically a consolidated hollowed out shell of its former self. Outside of public and college radio there is nothing interesting happening there at all.