Teachers do screw up at times, but the stundents ultimately make the biggest screwups.
One time, we had a school talk show hosted by the school itself. It lasts for about half an hour and it topics were basically about the issues that the school had. Students could also talk to the principle involved by phone and the calls are then transmitted live for all to hear.
Well, one time, a student called the principle and it went like this:
Student: "Do you know what I think?"
Principle: "No, I don't."
Student: "I think that you're a stupid @55h0!3."
*Silence*
*Program immediately shuts off*
The majority of the classes in the school kept silent for a while as a few classes went off in laughter.
I was like:
".................................................................................

.................................................................................. :-/ "
The student got caught within the hour and was later expelled. He was caught when he started bragging to two girls about how tough he was on what he said.
Doofus. :-/