Are they crazy before or after associating with you?
ME: "before we start dating, I do not have time for internet porn because I am constantly talking about guns online, I will waste entire paychecks on gun stuff and if I can, I will go to the range several times a month, if we start dating you should know you're dating a right wing conservative libertarian anarchist pro-life anti-government agitator that sometimes reads the Bible"
HER: "oh that's fine"
HER AFTER WE MOVE IN TOGETHER: "oh my gawd you are constantly going on about stupid liberals and guns and stuff!!!, I am breaking up with you"