1. They’re not taught critical thinking skills.
2. Their profs indoctrinate beliefs (I have had a couple admit that they need to get them young).
3. Free beer.
4. Free concerts.
5. Free food, ‘brownies,’ etc.
6. Easy was to meet and hook up with someone.
7. Wanting to be in the hip crowd.
A (much younger, single) acquaintance of mine works on a college campus. During the elections of 2008 he told me that he went to ALL of the Obama-type rallies.
Since he's even more conservative than I am, I asked him "GAAA! Why!!?"
He told me that the BO rallies were the best places to meet ladies "of a certain morally ambiguous nature". He also said that, in general, they were "not as intellectually gifted as other women he'd meet, like the ones in bars".
His quotes, not mine. So long as he's still only shopping around for one-night-stands, I'm sure that he's looking forward to 2012. :-)