For parents who are concerned about this band, yes it does have mild language, but it's WAY more appropriate for teens. From what I heard on the radio (songs that are directly about sex and drugs) this is a much better for teens. I love this band, and it gives teens more of an edgy feeling rather than feeling they should have sex or do drugs in order to be "cool". I wouldn't suggest this to every young teen, maybe some teens who understand the lyrics more.
From another viewpoint, 13 to 14 (mostly 14) year old teens are entering high school, so they are going to start exploring their mind and how they want to be seen in the real world. This band is way better than those bands (such as one-direction which targets young girls to make them feel like they should give into love at an early age) who target the younger crowd to get them focused on stupid things like drugs, drinking, smoking, and having sex. Watch what your kids are listening to. It may not seem like a big deal, but music is what we try to make ourselves to be. Has an even huge negative effect on younger teens who are still finding out who they are. This is a much better choice. Please, younger kids, do not give into the mainstream bands they have nowadays.