As adamant as I can be for Teens in the library, I think Greg does bring up a very legitimate point in his comments. Teens can certainly be brash and take things way further than necessary. For that matter, a gang of teens can cause major discomfort among general library population.
So, the question is, at what point do you ask teens to leave the library?
Personally, as much of an advocate as I am, I do expect proper behavior from my teens. I expect them to be in control of themselves and able to follow the rules of the library. Sure, they can have their fits of giggling and their occasional outbursts, but that does not mean it dictates the pace of the library.
When it comes to determing when to ask teens to leave, I use two rules:
1. If they cannot control themselves
2. If they have decided they will dictate the rules of the library.
Breaking either one will result in being dismissed from the library and I tend to adhere to them quite tightly. As contradictory or tough as these may seem towards my advocacy goals, believe it or not, I have found a lot of success with them. I found I saw less of the problematic teens (but when I did they were a lot more respectful) and even grew a larger group of new teen patrons. In fact, my monthly attendance numbers surged when I implemented tighter boundaries.
Don’t forget, teens have a general want of acceptance. If they misbehave, you can kick them out… chances are they will be back and on better behavior.