One flaw with your strategy is that if 127 forks causes enough of a slowdown, other users may be unable to log in at all, thus the DOS criteria would never be broken, and the machine would forever stay in DOS mode (as long as the baddies are logged in). This problem would be accentuated if a system cron job suddenly started the weekly backup to DVD-ROM or tape drive (or whatever) at the same time that the DOS mode was active. The combination of the two heavy loads would bring the server to its knees to the point that the only hope would be rebooting.

If the person operating the server has a problem with some of its users, perhaps he (the system adminstrator) could set some policies that either restrict their bad behavior, or that make the place no fun for baddies. Once the policy is violated, there'll be legitimate reason to show them the one way exit door. In other words, he should grow a backbone and not ask one of his other users to sabbotage his system as a childish expression of disapproval of one or more of its users.

Your post sparked a big debate between at least one of the Janitors and an individual who believed the post should be reaped. Frankly, if it had been considered for reaping due to malicious or dangerous content, rather than for being useless, it probably would have been reaped. We don't reap for uselessness, but we do for posts that are dangerous.