This is just distasteful - and the fact that someone else is ransacking the digital archive of a teenager doesn't make it any less sleazy for you to link to it. Bristol's mom is a politician, but Bristol herself is an 18-year-old girl who has no say in what her mother does for a living or the stances she takes. Or is investigating the personal details of a politician's daughter okay as long as she's a Republican?
As to the substance of the claims: I could show you the Facebook page of my 15-year-old cousin (except I wouldn't because you'd probably post it to be viewed by 3 million people), where she talks about alcohol, parties, being a "slut", being a stoner, and I'd still be shocked if she did any of those things (well, maybe except drinking). Kids talk a lot.