There needs to be a written down system of rules, like jailing is for bigger charges of harrassment like bullying or sexual harrassment, little things like calling someone a bad name should be just a ban. 10 rocks isn't too bad btw, i don't see it as a reason to quit. Buuuuut another idea is to change the punishment itself, rocks is kinda "eh" when it comes to a type of punishment, if we find a better punishment and enforce it along with the ban it should work out way better. But I still think just one is not enough, its too flawed to work out in a majority of cases, no system is perfect but a combination of them can yield better and more fair results.