What to watch out for
On the one hand, seeing all these young entrepreneurs be creative and innovative is a great example for teenagers, but some of the actions that lead to Facebook's success are shady and unfortunate.
They're big thinkers with great ideas, but many of the characters make questionable, borderline unethical decisions. Mark alienates and forces out his best friend, and he's accused of stealing the overall idea of Facebook from three other Harvard students. The character of Sean Parker is egomaniacal, parties a lot, and is the main catalyst for some of the uglier wheeling and dealing that goes on behind the scenes.
A couple of men nearly come to blows but are stopped by their friends before an actual punch is thrown. In one scene, security comes to escort a character after he violently destroys a laptop.
Sexuality is one of the main themes (and one of the major motivations for Facebook) of the movie. No graphic is sex depicted, but in one scene two young women take Mark and Eduardo to bathroom stalls, where they kiss passionately before the women take off the guys' belts and perform oral sex (you see one woman squat down before the camera cuts to the guy's ecstatic face). In another scene, a couple wakes up together but neither can remember much about the other -- including their names. The girl walks around in panties and a cutoff top. There's a scene of strip poker, and lots of women come on to the guys, make out with them, and dance around them while scantily clad. In an online pre-Facebook stunt, Mark pits women against each other for others to rank according to "hotness."
Lots of casual use of words like "s--t," "a--hole," "screw," "h**l," and "bi*ch," and even a couple "f--k"s. Also "godd**n" and "oh my God."
Obviously, the movie is a huge promo for Facebook, even if the tale of its origins is at times deeply unflattering toward founder Mark Zuckerberg. Many other brands are also featured, including Gap, Livejournal, Heineken beer, and schools like Harvard, Stanford, Boston University, Columbia, and Yale.
Drinking, drugs, & smoking:
College students drink like fish. Mark and his sophomore roommates get drunk and stoned in their dorm rooms and at frat parties, dinners, and nightclubs. There's lots of beer, cocktails, and champagne drinking, as well as pot smoking and even lines of some drug (probaby cocaine) about to be consumed.