While doing a Paragon of Order run, I was thinking it would be really helpful if the Law skill actually had a useful function. The idea is that if you 'a'pply Law, you would get a message of either:
"You cannot sense the presence of any Lawful beings"
or
"You feel as if there are n Lawful beings nearby"

It would not show you where the monsters are or which monsters they are like Detect Monsters does - simply tell you how many exist on the level. The main use for this is to check if it is safe to kick a door, since you are probably kicking a lot more doors than you have wands/scrolls of detection. You could also to decide whether or not to open a tension room, if it's safe to cast Earthquake, or whether you can place the Orb of Earth on the altar. I think it would work for the entire floor regardless of skill level, but maybe it's radius could be influenced by skill such that 100 skill == entire level.

edit: ah, shoot. accidentally made this a bug instead of a feature... don't see a way to edit it