this is why i don't have roommates anymore.people kept messing with my shit. one of my former roommates tried to mess with my computer. i reminded her that if i caught her trying again, i would have her kicked out of school.
it worked on her.
you could always remind these people that any part of them that touches your shit will be amputated..... of course, that would cause blood to get in the carpet....
just an idea.
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kuru
'if your children ever found out how lame you are, they'd kill you in your sleep.' -frank zappa