O'course, IMC, teleportation magic makes a loud noise -- D.Door makes a *bamph!* and Teleport makes a thunderous boom. Plane Shift.... ooo, that sucker shatters glass.
Teleporting into solid objects is usually considered a bad thing, right? So, I'm thinking a real cheap way of proofing important areas against teleport is to have lots and lots of strings hanging from the ceiling - it won't make it hard to walk around or anything, but they'll sure ruin a teleporter's day.
