As said before, I do not believe that any of actors owes to fans anything, they made what in their contract requested, is paid for this, we got our entertainment and studios their money. That is all. If they are kindly and lovely at the cons to the audition, maybe it is caused by payment of organizer or maybe not.
I do not think it is a fair and proper action to write something critical where the fans express their admire. I do not want to provoke anyone. Sorry for this one, but it must be said.
I never like Avery Brook's interpretation of Captain Sisko, frankly do not like the Sisko either. He was to me typical "American Politician" who brings the democracy and freedom to the "barbarian" with all these religious colored speeches that no one believes anymore but from so called democracies of this world no one dares to contradict, if anybody does who will be definitely punished. Brooks delivered to well fitting totally overacted scenes which are even toooo much for some b movies. I never buy a second that this person can be a captain or any kind of leader. (OK, only once: Our Man Bashir. He did not need to "over"act, he acted as always.) Classical Shakespeare player as Patrick Stewart or John de Lancie made great job with their back rounds, but Brooks? He never get out of it. It has to be always dramatically, even he tells recipe . He cried loudly the audition with his every words, every moves, "Look, I am too good for such crap, but I need money and bring you asocial proles a little bit high culture" . His attitudes to fans or con-folks (or to ISB ) not surprise me, he is just consequently.