For me I think it's a toss up between going on a date with a guy who made completely inappropriate sexual jokes the entire way through (I'm not a prude either!) then asked me if I'd brought any viagra with me...or the 3rd date with a guy on which I found out through Facebook stalking while him was in the loo that he was in fact married...
So just a little light hearted thread....What were your worst dates? :D