It's not simply a matter of the water bill, but also what culture it promotes around their service, what customers (or "customers" in quotes) this attracts, how this affects other actual customers and so on.
McDonald's have bought or rented the place, own the equipment, pay their staff, and pay taxes. They did all this to offer a specific service. You can take that service or leave it. They're not a public free water dispensers, or social services, or whatever role people are trying to impose on them.
It's not simply a matter of the water bill, but also what culture it promotes around their service, what customers (or "customers" in quotes) this attracts, how this affects other actual customers and so on.
McDonald's have bought or rented the place, own the equipment, pay their staff, and pay taxes. They did all this to offer a specific service. You can take that service or leave it. They're not a public free water dispensers, or social services, or whatever role people are trying to impose on them.