I've been in so many workplaces where a customer was walked out from the business premises for being too unruly. I support such kind of management decision because the customer will disrupt the business activities.If the customer is uncontrollable and if they tend to cross their limits, then it is much better to call the supervisor when such kind of scenario occurs. A supervisor may call the manager and he may try to handle it if things get out of control. This is why managers are always there in order to intervene all the time. No wonder police gets called when things escalate a lot.