Positive messages: Personally, I think the positive messages in this show are amazing. I can honestly say that this show has changed my life so much. It has taught me to be who I am, to love myself, to dream big and so much more. I think the portrayal of teen sexuality, bullying and teen pressures (sex, alcohol, fitting in e.t.c.) are really good. It teaches you that it is okay to be different, and that you shouldn't have to hide yourself.
Positive role models: Most of the characters in glee are positive role models.
Violence: There isn't much violence at all, except for a little bit from the school bully.
Sex: Glee is quite sexy. They occasionally wear skimpy outfits and do sexy dance routines. Sex is referenced quite alot, but they're in high school, isn't that normal? A few characters do have sex, but you don't see them have it. You may see them lying in bed but that is about it. There's no nudity whatsoever. The show includes alot of kissing and making out, but they're teenagers in high school. What would you expect? It also portrays teen sexuality very well, with two gay guys, one lesbian and one bisexual girl as a member of the New Directions, aswell as several other gay/lesbian characters. There is also, as of season 4, a transgender member of the New Directions. These characters portray their difficulties of their sexual orientatons, but the show shows that it is okay to be homosexual.
Language: The language isn't too bad, it includes mild swear words and a few rude/sexual terms, but nothing that teenagers aren't open to in their everyday lives. Life isn't all sunshine and rainbows.
Consumerism: not really any.
Drinking/Drugs/Alcohol: There isn't much use of these things, although it may reference too them a few times. The only time alcohol is really used is season 2 episode 14, 'Blame it on the alcohol', where the New Directions go too a Party at Rachel's house and get drunk. They are later seen dealing with the effects of a hangover. In the pilot episode, Mr Schuester plants drugs in Finn's locker to blackmail him to joining the Glee Club, and in the first episode in season 3, Quinn has a downwards spiral and is seen smoking. I can't remember any other uses right now.
Overall, this show is amazing! Definitely okay for 12+, and consider letting your child watch it if they are over 10. The things glee portrays are things we are open to in our everyday lives, and they deal with the issues very well. I LOVE IT!
P.S. They also portray race very well, with two asians, one mixed race and two black people in the show. There are probably more than that aswell! Also, they deal with religion well, with several Christian and Jewis characters.
They are so talented with amazing voices aswell. So many great covers! (over 400.) well worth the watch!