Yep.. which will still trigger a response because the admin will be like, "Where the hell is my log for yesterday?". The best thing to do would be to trojan /bin/login with a hacked version of it so that you can login with a certain username that isn't tracked. If you hack /bin/login's source, then you can even make it so none of your processes show up. You were never there, but, yet again, you were. Very interesting concept..