Oh, another nice one, combining recklessness, foolery and some mean players having fun.
Evil campaign, we're level 13. Attending this day were
My CE drow swordsage 11 (shadowhand and desert wind techniques) who can't bluff jack but always tries (if it works, it's cool, if not, they get angry and you have an excuse to kill everyone! Recklessness is fun!)
A mad, Cyric worshipping CE halfling rogue/invisible blade type.
A LE githzerei monk of bane.
We were in some border regions, disguised as a paladin of helm (me), sun soul monk and little child (who they thought was a chosen one).
We recently vanquished a great evil in the area (we don't like competition, but do like loot!), and enjoyed the tyrrans' hospitality in a castle with a big church of Tyr, and a shrine of Lathander.
Anyway, the monk (not the wisest guy, I wonder how he ever managed to become a monk) decided to desecrate that shrine of lathander a bit. In broad daylight! Okay, there was noone around right now, but still. He started carving Bane's symbol into the shrine with a shuriken, and of course, the thing became awfully hot, it began smoking and people were attracted. I don't remember what he did then, I think he did a very bad job of making an excuse (like that "that's not what it looks like, honest. How did that bloody knive get into my hands" kind of situation).
And now the fun started. The halfling / child was around to watch the whole thing, and started screaming "it was him! it was him!" This attracted a powerful paladin who detected evil, found the monk to be evil. While the halfling / child cried: "he deceived me all this time!" the paladin started to whack the hell out of that monk, who promptly fled home with his plane shift power.
Of course, to get back, he had to plane shift again, and got back 400 miles or so from where we were. He got a teleport ride, but that wasn't cheap.
We were in tears over this ("we" meaning "not the monk's player"). That's evil parties for you, teaching you a lesson about not being too damn obvious. It's the school of hard knocks indeed.
The best part was when we were giving the DM advice on what the paladin would use
"Did he use smite evil? Don't forget that!"
"I'm sure he'd power attack for more damage!"
"He looks as if he had Divine Might"