takasi said:
Why not? He would want to put treasure or secret doors in hidden, out of the way places. Wouldn't he want to put traps on them?
I just told you what the most clever would do, imo. Rigging the linen closet to blow is going to get the guy not paying attention. But doubletrapping something is going to get the guy who's sharp but not the sharpest. And the problem with trapping out-of-the-way places is if you're dealing with some special forces guys who aren't going to wander around your house looking into the linen closet. Wasting the money on that CR 10 trap in the out of the way room doesn't help you when they just walk past it to your secret lair.
Your last 10 traps should have killed the people who aren't talented, but you need to do something about the ones who
are, because they're the real threat.
Besides, trapping something also sends up a red flag that says 'Hey, I'm worth trapping!' If you have a gem hidden in the false bottom of a cookie jar, do you trap the cookie jar so that whoever survives the trap will suspect there's something inside worth finding, or will you just let them assume it's a cookie jar?
And trap #1 doesn't need to really be there to kill the guy. Trap #1 should set him up for trap #2 - the solvent glue attached to the inside of the secret door so that when he opens it he's stuck to it, and thus his reflex save is going to have a serious hampering.
That, and I'd sprinkle secret doors that lead into the septic tank, and copper that's just painted gold. Sometimes frustrating them is far more enjoyable than killing them outright. And if you're real good (like the False Lich in Tomb of Horrors), you can get them to take the stuff you don't care about if you fool them into thinking they've got all that's there.