Hardly a sloth mud topic... but I know the amount of programmers and nerds that frequent here, it will be helpful...
VNC has a flaw...
http://security.itworld.com/nl/security_strat/05232006/
I just personally witnessed a hacker enter my bosses computer bypassing the VNC password and try and download an IRC bomber.
I opened notepad and said "Who are you?"
They replied "I am securing your computer."
Then they got disconnected... by me...
Kill your VNC's if they are connected to the outside world.