Hi Guys and Gals

New to this so plz forgive my ignorance.
Currently I've kept busy in chatrooms, but recently some smart asses come into the room and freeze it with a script of some sort. They also boot me out of the room cause I speak up and tell them to gey a life.
Is there any way of blocking a script or making a user helpless or keeping him out for good?

Need help before I lose the plot in there

Thanks all