Such as:

"I just don't think people should have abortions." - Girl in a philosophy class about current moral and social issues. (She also said that each time you have sex you have a 50% chance of getting pregnant because you could either get pregnant or you could not. Flawless logic!)

"The cow that becomes my meal should be thankful for me because if I didn't eat it it would not have been born." - My boyfriend, sadly. (Eat meat, don't eat meat, whatever. But this argument sucks!)

"Animals are inferior to humans because look at all of the amazing things humans have built!" - Almost everyone. (Yeah, look at all the amazing things that humans have destroyed too! I've never seen a llama drop an atomic bomb or commit genocide. I'm not saying that humans are inferior to animals, but once again, this argument sucks!)

Please add your own.