I imagine that every Q&A panel at every convention ultimately goes this route. I know I’ve witnessed some like this myself. I feel sorry for character actors who are only loved for a single line but have a huge impressive body of work. I don’t mean folks like that hack child-actor from ‘Jingle All the Way’ who went on to some other no name b-movie garbage, I mean hard working actors and actresses filling bit parts left and right and only being remembered for that one time they said ( insert catch-phrase based internet meme here ).
Don’t make them dance like cymbal playing monkeys while they’re pouring their heart and soul out during some of these panels. Pay your duckets in the photo-op and autograph line later like decent folk and do it then.