I think the most maddening thing you could do in that scenario without being malicious would be to just log in periodically, pick a teacher at random, and "corr

I think the most maddening thing you could do in that scenario without being malicious would be to just log in periodically, pick a teacher at random, and "corrupt" their name randomly. Switch two letters, insert random symbols and numbers, etc. Don't make the names insulting or anything, just make a subtle, visible, slowly progressive 'bug'. Assuming it isn't ignored, you can smile to yourself years later at the thought that there is a bug report open somewhere that a poor engineer has probably spent weeks trying to reproduce.