How much you want to bet they’re hoping to be asked to leave and then use that as “proof” that Chik-Fil-A is discriminatory against gay customers?
The key word there is "customers". Surely there must be laws against loitering. Someone who hangs out in a restaurant without buying anything is loitering, IMO, whether they're kissing or not. It should be perfectly acceptable for the owners to ask them to leave! If they refuse, the police should step in.
OTOH, if the protestors have to buy food to stay, they're actually supporting the cause they intended to protest.
I had a CFA sandwich yesterday (took two hours to get it) but I could have another one tomorrow while I'm laughing at the protestors...