I'm kind of ambivalent about this show, but I do feel the need to defend SB somewhat (yikes.) Exactly what has she done that is so immature? She's let him know she likes him, a lot. She's let him know she would like to kiss him. She's talked about him getting intimate with other girls, and how she hopes if he isn't kissing her, he isn't kissing others. She's physical with him, and she isn't concerned about hiding her feelings (whether they are valid at this point in the game or not, which is another topic altogether). She uses language (awesome, wicked, holy s*it) that some may not like or approve of. Big whoop!
I've watched a lot of these shows. There are plenty of women who act no different than SB, whether they are 23 or 33. Kirsten was very possessive of Andrew. Remember the chick who let herself into Byron's room while he was in bed? Shoot, Tara and Jehan, IMO, acted much more immature than SB when they crashed Susan's BD party.
Do I care if SB wins? Not particularly. I'm not emotionally invested in any of them. I just wanted to point out that her behaviour isn't, in my mind, all that bad. She's not backstabbing the girls, she's not stumbling around drunk, she doesn't appear to be spiteful or vindictive, she's no Trish! That behaviour may come, who knows, but at this point I'd be content to say she's a nice girl, young, who doesn't seem able to hide her personality or her feelings.