I think the touching was uncalled for. But I wouldn't necessarily call her actions "racist", per se. That's a tad bit too deep. She's just going off the stereotype that many of us haven't exactly proven wrong just yet. She thinks black women don't wear their own hair, and until we stop seeing the weave fro-hawks, micros, 27-layer pieces (whatever you call them) and florescent weave tracks in everyone's hair, other races are going to believe that...
But sometimes, we don't open up to other people with our hair. Many of us are quicker to ask a white girl about her hair than to answer when a white girl asks about ours. One day, I was talking about hair and one girl, who was biracial, told my friend, who was white, "Oh, this is a black thang." I corrected her quickly and explained what we were talking about. We need to open up and not clam up when other ppl are curious. In many ways, I'm flattered instead of offended. Some take it as racism, I take it as flattery. Racism doesn't work when you disregard it (in some situations). Only a hit dog will bark.
I'm glad this board is formed so that we can stomp that sterotype though.