In some countries, the law is that if you're working on a "public offer" deal (where you don't sign any contract), you can't restrict. Any restriction (like ask

In some countries, the law is that if you're working on a "public offer" deal (where you don't sign any contract), you can't restrict. Any restriction (like asking a disabled to get out of expensive cafe to not bother other people) can be punished. If you need to sign a contract with a representative, then yes, they can choose not to do it.