Exorcism for Undergrads?

It's Little 500 weekend, an extended weeking of partying for the undergrads that provides many opportunities for them to keep me awake. I'm wondering if the following carving/plaque thing could be used to keep the undergrads away from my apartment?

Melissa took the photo with her camera phone, so in case you can't read it, it says, "Evil spirits cannot enter an inhabited house unless invited. - Sir Walter Scott"

I'm not sure they're evil, but they sure are annoying, or maybe annoyingly evil...