Just to clarify a little bit...
It's easy to find me on LJ because one is able to navigate through UserInfo pages based on one's interests or the communities he/she belongs to. Being that I'm an active contributor to the Alpha Gam community (and I'm co-moderator), it doesn't take an genius to find me.
However...on MySpace, it's a bit more difficult. Most people find others through networking...kind of like having a mutual friend of sorts. I don't know how in the world she found me considering most friend groups are based on region.
To update on the situation, I received an apologetic reply from her. She explained that she was caught off guard when she saw the pictures and was alarmed when she saw my affiliation in my General Profile. She also thanked me for not really biting her head off and spitting it out. If anything, I think she was more embarassed because she didn't know I was an alumna and she held such a sassy attitude with me. When I was a collegian, we were strongly encouraged (well, forced to, okay?) to never disrespect an alumna whether or not we agreed with them. Anyway, collegian vs. collegian/collegian vs. alumna/alumna vs. alumna or whatever ... you just don't call out someone like that unless there are reasons behind it (very much similar to what PM_Mama mentioned).
I explained to her my views...our views actually, because your responses so far have been what I have been thinking for a while.

I figured hey...she's young...a recent initiate. A lot of us say/post/write things online without thinking sometimes. Some of us more than others.

Mwahahhaha.
It's funny. She then requested that I "add her as a friend" on MySpace and that she'd "see me in Chicago". So what did I do?
Of course I added her.

I'd be an uber evil sister if I didn't, and I've already exceeded my "evil quota" for the evening.
For those of us who faithfully keep an online record for the whole world to see (whether it be on LJ, Xanga, or your own personal domain), this is something good to think about.