> We don't do hard quotas, but I am thinking of ways to nip these situations in the bud, as it were.
Perhaps you should do hard quotas. :-)
I'm no fan of the bureaucratic process of looking for someone to grant me more space. But if it happens often that (for example) developers on your server accidentally leave some tool running in a very high debug level, it's easier for them to ask for more space when they need it than for you to start hunting the offending dev when *you* (and everyone else) needs it.
This depends on the usage of the server, of course -- I'm only recommending this because it sounds like you've had this occurrence frequently. On feather, Juerd++ just made a note asking people nicely to clean up after themselves and I'm pretty sure they did. Of course that requires noticing a problem before it turns critical.