if you pay for tix chances are that you are here to watching the bands, ie your friends, perform right? so in that case, what's with the whole tv thing? pure disrespect, and a cheap play to get other customers who are not there for the music to stay.
look at clubs. when they hold parties, the entire venue is for the organiser and his party goers. everyone is treated as though they were a customer, even if they just pay cover charge. and strictly no one else is allowed in unless of course they purchase a ticket. gas haus should review their way of doing things, that's for sure, if all these has happened.
i'm not commenting on the gear part as i've never been there to experience it myself, but i'm of the opinion that if you did not recce the place before ur gig, its ur fault if anything screws up, cos you had all the time in the world to source potential problems and fix them before they turn into real problems.