This disrupter seems a little weak when you have a board with a lot of 1x1 tiles or 2x1 tiles... I should let it work for a whole room, until the room is blocked by doors or walls??
Or is "tile" in the rulebookl interpreted in the smallest sense?
Well, according to the rules, a "floor tile" is anywhere from 1 to 16 squares in size, so I guess you have to be careful where you set it off.
It kind of makes sense to me that it's supposed to affect a "room," but given the flexibility of the map, I think it might be tough to define room boundaries.
Common sense should prevail, I suppose.