Comment Use an obnoxious name and password. (Score 1) 695
Call your lappie some exotic female name so the login screen says Welcome to Linux on Samantha, or whoever
Tell the nuisances who want to use your computer that the guest login name is ROOTER
and the passphrase is "is going to catch AIDS"
That fact will get around the dorm. before you can say Jack, and you won't have any more problems.
Let us know if that doesn't work please.