Following on from another poster's thread about alarm bells going off because a man says he only likes thin, beautiful women and that he admires the infamous wife-beater and coke-head Charlie Sheen, I wondered what other really obvious alarm bells you've come across.
For me (different men):
Telling me that his Nan had to move home, because it had blacked up too much where she lived. (That was a first and only date, ladies)
Going home to meet his parents (only child) and he was really, really rude to his mum.
Overdoing the compliments about how I looked (sadly that was a good few years ago now) and wanting to buy me designer dresses. (It sounds lovely, but alarm bells were going off all over the place and rightly so, as it turned out).
Further ones, that would preclude any sort of relationship:
Possessing a poster of Jordan
Thinking Jeremy Clarkson is a great bloke, who speaks for the common man
Reading the Daily Mail (OK, I'm a weedy liberal, but have no objection to the Torygraph)