This reminds me of china's first aviation law case which ended with the victory of the aviation company.  The title runs like this: Hi, customers, not every customer is god.

It is the owner who gives the definition of shangdi(god).

Do you agree?
What do you think?

Yes, it is.
It is "within their property" and they are the boss.
In most American shops, there was always a warning on the counter running like this: We reserve our rights to refuse our service to  you(something like that).
And in England, in most super markets and shops, a warning on the shelf running like this:  You open it, You buy it.  You break it, You buy it.

Some times you have no choices but to follow.

Do you agree?
What do you think?