Actually, that's almost true. If something happens in a class that I don't like, I'm not going to single out a few students who MIGHT have been involved and let everyone else off. I'll punish the whole class.
I don't agree with the administrators on the whole issue. Graduation is a time of celebration, not petty discipline matters.
Mob punishment is quite effective in the right circumstances, such as a classroom where you will see the same people everyday for months. IMO, it does not work in one-shot instances against people who you ultimately do not control.
My question to taks was meant to get a better gauge on his opinion as he seems to contradict himself just a few posts apart.