From your answer, it seems you study for their sake. Peer
pressure, as most would call it.
If you study for your sake, I don't think you will be bothered by
them.
My class is a slack class as well, you see me online almost
everyday. But in the end, it's still all up to you. Study for
yourself, for your own future, you won't be bothered by them.
The power of the mind wins everything. 
