Up yours. The server is already dealing with the drunk who's trying to escort other customers out the door. The bickering couple who thinks he should be providing marriage counseling, and the asshole with the screaming kids who keeps trying to rewrite the entire menu. On top of that, none of these are even his tables. His section is in another room, but he was kind enough to drop off a bottle of ketchup because the server in that room decided to take a smoke break in the middle of dinner rush. Be happy he gives an exasperated "sure" instead of beating you to death with your damned camera.

(Yes, I've served before and yes, I've dealt with all of that, most of it repeatedly and much of it all at the same time.)