I do find it a problem if they act like they are in a rush. Most of the time them rushing through the stage door line results in a bitchy attitude about the whole thing to begin with. They can walk right passed the crowed without anyone saying anything.
For example, I saw In The Heights on Wednesday night. Ms. Lopez walked right out and passed the crowed. Clearly because she didn't want to sign and that was okay. Mainly because her wanting to sign or not is her choice.
I would have felt pissed off if she ( not that she would do this she is too nice of a person to do this) was an ass about the whole signing process to begin with. And, did sign but was mean to everyone while doing so.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll