no. no and no. the actors who you've just paid your $100 to see in the show owe you nothing more than to perform in the role they've performed. If someone stops to give you an autograph, you should consider yourself fortunate that they stopped and had a moment with you. You can't possibly think that because you paid for a ticket to the show, that the actors in said show are required to be nice, friendly or courteous to you. Of course, it's nice to live one's life that way and to be all those things, but these people are not whores (not all of them anyway).
Seriously though, they work their a**es off all week, usually not just performing 8 shows, but making appearances, going to auditions, doing readings and concerts. If they want to go home and sleep after they've just busted their butts for 3 hours, let them go. I think people need to change their outlook on this-you should feel privileged if someone DOES make a connection with you, not pissed off if they don't.