It's amazing what an incredible filter "you have to use plan 9" is for things. I have been doing public plan 9 services on and off for a long time, and although I'm sure someone will be a jerk eventually, I have yet to see any deliberately malicious behavior. On the grid right now, things are pretty open and the user community is all cooperative and constructive. So far as I can tell, the venn diagram of "people looking for trolling and malicious lulz" and "people interested in using plan 9" has approximately zero overlap.