There are so many things that the forums has two distinct sides on. There's the edgy side, whether they'd admit it or not, and there's the morally-correct side, whether THEY will admit it or not.
Right now, all I've gathered is that she's been drinking with her friends way more than once, and who knows if she has more than just whatever is hidden. It's obviously a problem. Personally, I would tell. She's loving fourteen, and it's to no surprise that the edgy part of the forums is all like "OH ITS FINE."