I wanted to come back and thank everyone for their responses.
I also wanted to explain where I was coming from before you all think I'm some nosey neighbor, LOL.
When I first saw the girl doing these things, I ignored them. Like all of you, I said to myself that kids need to rebel a little, and everything did (and does) seem innocent enough that I didn't pay it any attention.
By now, I've been watching this go on every school day for almost 6 mos.
I think that the day I wrote my original post, I had some crazy, caffeine-induced, wild-hair idea that if I said something to her mom, maybe my neighbor would wake up and start paying attention to this girl and what she's doing and maybe take some steps to prevent this daughter from going down the same path as her sisters. About 30 seconds after I hit "submit" I came to my senses and remembered who I was dealing with. This is the woman who said to me as she watched her 13 year old go off on a date with her 18 year old boyfriend, "She'll be knocked up by Christmas, just like her sisters", and then laughed about it. (Christmas has come and gone, and I haven't heard about any new grandbabies, so let's all keep our fingers crossed!). I guess I was having an "it takes a village!!!" moment, LOL.
Like I said, I didn't want you all to think I was the buttinsky of the neighborhood. I just makes me sad to see this little girl doing the same things her older sisters did, and no one doing anything to guide her in another direction.