Hilarious Ways to mess with your players.

[The Random NPC]

I've been planing out a village that "plays by the rules". And by that, I don't mean they're lawful, I mean they use RAW rulings for everything.

For instance, the average commoner will have no idea what race any adventurer of higher than level 10 is (knowledge check being 10 + HD of creature to be identified).

It's worse than that, untrained knowledge checks can't reveal any information above DC 10.