What a stupid, reckless thing for the professor to do. Of course, it’s possible that it wasn’t an accident...
I disagree. I think the professor made his point about informants very well.
If I were him and found out which students alerted RadarOnline, I’d consider flunking that student or at least docking him some points on his grade. They obviously completely missed the point of the reading, and they aren’t supposed to be sending texts and emails in class anyway.