I'm not sure of all the details of this particular trap, but it seems to me that if you arrive in the room via teleport, it shouldn't sent off the trap since you're not actually "walking" anywhere. The only exception to this line of reasoning is if your teleport spell happened to drop you right on top of the triggering mechanism for the trap. To me, the likelihood of that happens seems like it would be infintesimily (spelling?) small. Here's the log:


The bartender nods.
The bartender says 'Good. That's the first of it.'

<100%hp/100%hp 73%m/73%m 79%mv/79%mv 4230tnl 12 PM (35.91%)> whe
People near you:
(PK) ME The Drunken Efreeti Inn

<100%hp/100%hp 73%m/73%m 79%mv/79%mv 4230tnl 12 PM (35.91%)> c teleport
You have become better at teleport!
The Darkest Part of Blackwater Swamp

<Exits: north south west>
You hear a slight snap of a branch as a large log comes swinging down from the trees in your general direction.
The falling log trap DISMEMBERS you!

.