Was breaking the ties with my friends a good idea?

So, a few days ago, I decided that it was time for me to let go of some long time friends of mine that were holding me back. We were all kind of a clique, but they always seemed to exclude me from so many things. I know when one of them aren’t around, the other two will talk about them incessantly. They have nasty, dirty humor, which I take offense to, and they don’t respect my opinions at all. They want me to sneak out behind my parents backs when I’m grounded or not allowed to go to a certain place with them. Though we’ve had some good times together, I feel that the relationship is really just not healthy for me. I tried to quietly disband from them, but they went and made it a scene and aren’t taking it well. They’re acting like children. I have no problem talking to them, but now they completely avoid me. When I walk in a room, they all leave. Typical high school drama. What do you think? Of them? Was this a good idea?