You know, we (Unix-y people) need a new signal, stronger than SIGKILL. As satisfying as it can be to type “killall -KILL firefox” (we just know that's the actual reason you still love the command line), there are a number of situations where that will still not get rid of the damn process; for example, if it's in the middle of some syscalls, specially nfs (grr!) or swapping (which is precisely when you need to kill it). So I'd like to propose a new signal which, let's say, waits for half a second, and if the process really doesn't respond, then gets rid of it for good, regardless of what else it was doing. In the middle of your quality toilet time, with pants down and all? Who cares, just get out. (If the process does respond, then I suppose do a -TERM... or rather, the other way around; send a -TERM, wait half a second, and if nothing seems to be happening, then bring out the ultraviolence?)
Here's a list of suggested names for the new signal.
and my personal favourite: