Oh, we had people who used the "I have to study" excuse to get out of mixers too (or who just stayed for the at-the-time required half hour and went home). Usually they were older sisters who were a little scared of the new and different fraternities we were mixing with that weren't the old reliables. We all have some lame sisters. It's the truth.
But let's face facts: these policies - super easy pledgeship, getting rid of/restricting mandatory events, and making it hard (if not impossible) to get rid of lame pledges or sisters - aren't being made by current students. They're being made by the national councils and HQs who on one hand are terrified of getting sued for hazing, emotional distress, what have you, and on the other hand are scared to death of being perceived as politically incorrect or elitist. It's nice of them to believe that just getting a bid to a wonderful group will turn your attitude around and make you a responsible person who gives your all to your sorority but life just isn't a bowl of cherries like that.
Like als463 said, the NPHC groups don't seem to have this problem...at least to this extent...and they're taking members that are the same age. So I think to just say "this generation sucks" is a little bit too pat.
hc: I don't know how mp3s work at all.