What is this for kind of logic. So if you have a store, and you happen to have a client that smashes someone else's head in your shop, then that means in your logic that you as a shop owner are guilty of violence.

But I guess you say you should know the reputation of every person coming into your shop, and if their reputation is deemed inappriopriate by a certain group, they should not be allowed into the shop to prevent them from harassing any other customers.

But how are you gonna regulate that? Who is gonna decide who is inappropriate and who isn't?

I think we already have a fairly well organized system for that: law & order. If someone breaks laws, they are punished for it. So if someone is violent, whether it's inside or outside a shop, they can be punished for it.

And you as a shop owner don't have to also individually take the effort to investigate and punish the individual. Although if you want to you have the freedom to; it's your shop in the end.