wankers with no respect for other ppls property. I hope insurance covers it for you but ****s who steal stuff just keep putting insurance up for the rest of us. THANKS ASSHOLES!
All you can do is change the LFS password (LFS checks the password used to unlock LFS is correct when it queries the server list or does anything to do with the master server).
But tbh i'd imagine the PC will be sold to a "mate down the pub" with a computer shop where it'll be wiped straight away.