Thank you to all those who sent me PMs!

I was reeling somewhat from some of the responses I received. I had to step back and re-evaluate.
I thought I had "framed my questions constructively."
My purpose in asking the questions was to gain an understanding of the reasoning behind why someone would be so intent on joining a "higher tier" sorority when it might not be the best fit for them--and to determine how those girls might feel if they accepted a bid into a "lower tier" or "mid tier" sorority.
I now understand that some girls (and their moms) have been planning this time for many years. My mom is not Greek, nor is anyone in my family, so I don't have that pressure. My mom doesn't care if I do or don't join a sorority. She just wants me to become involved in SOMETHING and have fun in college (after academics are taken care of, of course).
If I go through recruitment, I wouldn't rule anyone out because of tiers (higher or lower). I was a cheerleader in high school and was probably considered popular, but I had friends in all different groups (athletes, theatre, and the academics). I think it's more important to feel connected to people rather than an image.
Thanks also to all those who posted with constructive comments. To those who didn't, well . . . I guess I wonder what's bothering you that you have to be nasty. I thought sisterhood was a bonding experience, but I'm an idealist.