OK, I think I can guess now
I had the "get preffed by someone you've never met" experience. It was really disconcerting, particularly when Sigma Kappa's was so different from that. It really really throws off your opinion of a chapter. I understand it's necessary sometimes, but I'd rather have someone who at least met me. Or maybe someone who can sell the "I really wanted to meet you, everyone else told me so much about you" line.