From the submitter:
"My laptop charger only works if it's bent in a gentle curve. So I bent some Q-tips and taped them on for support. Works like new."
The only issue with this "lock" is that it's less of a security mechanism and more of a test of strength between you and the person coming in. If a 300-pound linebacker gives the door just one good yank, he'll probably send you flying from the toilet seat with who-knows-what strewn all over the floor.