Couple of days ago, I was playing Amurites on an Erebus map. My starting location was excellent, it had plenty of commerce and a ton of rivers for "Aristofarms". So I got all the basic techs, founded Kilmorph and started bee-lining Firebows to rush my immediate neighbors (Grigori and Calabim). Dain's PHI allowed for a very early Academy and Tablets of Bambur.
I was in a solid position, having pre-built 10+ archers and saved plenty of gold for upgrades. Then, just 2 turns away from Bowyers... I got an unexpected Religious Victory. WTH?! Needless to say I have not committed to spreading my religion at all, at most I built 2-3 disciples to spread it to my cities for happiness. However, it must have spread on its own possibly helped by the fact that nearly everyone (save for Grigori who obviously don't give a damn about religion and Balseraphs who decided to pursue their mad nature by going OO) went RoK.
So yeah, I was actually quite angry as I was expecting some real blood fest (if you played Amurites you will know how awesome Firebows are) and instead ended up with this religious "cheese" victory.
Now I make sure to uncheck the Religious victory condition when setting up a new game.