This hack is inspired from the series of stories called "The Bastard Operator From Hell" from http://bofh.ntk.net/bastard.html. This will "improve" the user expirence with the terminal in the vain of the story.
The first feature adds value to the tab autocompletion, instead of giving the boring end of the file name it will instead give you a nicely randomized string for your autocompleting pleasure.
It keeps you from running potentially damaging commands - by randomly blocking the return key.
It will give you a new lease on your disk space - by randomly inserting rm -r inbetween words
It keeps your userspace squeeky clean - It will hup all your running proccesses whenever you send a command, giving your account a fresh outlook.
And if you are really lucky it gives you a prize - it will show you an obscure bug, when sending a sigkill to all running user processes, causing an infinite loop.