[Mashood]

Then as a business owner, I can put up a sign that says police or EMT will not be served because they scare my cat.

[VRWCmember]

Then as a business owner, I can put up a sign that says police or EMT will not be served because they scare my cat.

You can put up any sign you want to. If you put a sign up like the one you described, you had better hope you don't get robbed or have a heart attack at your place of business; the response time might not be so great.

[TChris]

Then as a business owner, I can put up a sign that says police or EMT will not be served because they scare my cat.

I'd have no problem with that, personally.

Of course, the courts have also ruled that these public officials have no duty to help you when you need it either. :-)