Isn't there an implied invitation (Score 1)

In the hedge fund industry it is well understood that even just hosting an http server is an "implied invitation" according to the law. That means that without broadcasting or sending any packets beyond our network, we are inviting the public to access our system. It seems like broadcasting an SSID and hosting a DHCP server is much more of an "implied invitation" than that. So, is it a felony to accept this invitation? I'm assuming that the coffee shop is broadcasting its SSID, of course.