So your argument is that in compensation for your attention you are entitled to give uninvited criticism, or lets say tell them to play songs you like? Moreover, how do you assume that your criticism or the songs you would like to have played somehow take priority over other peoples interests? If I would be in the audience for some unknown band I certainly hope that people who don't like the music leave instead of heckling the musicians.
You are saying that maintainers have a "social obligation" by giving you something for free, so you are entitled to their time, because that's what it boils down to. To make another analogy (again admittedly flawed), would I be entitled to demand you reply to me, because I have given you my attention in this discussion?