[X] Signal to Brian that you might need his help with a Gruecloud if things get ungroovy.
-[x] Separate them with a wall of air, and ask that they both calm down, neither of them are getting anything they wants doing it like this. To Abbie Hoffman, gently try and suggest he come back on after the song in between sets. Everyone pretty much agrees with what he has to say, they just don't like that he interrupted a song to do it, and that would make them less likely to listen to the content of his words. When/if the show gets back on the road, remind Dionne again to not summon the devil. Take Hoffman aside and offer the services of Grue Security Consultancy (totally not a front for militant activism, wink wink, nudge nudge) and Lisa's finest investigative reporters to get the word out and get Sinclair out the slammer.
[X] Teleport unto the stage. "Whoa! Put the fucking guitar down Bright! And Abbie, I'm pretty sure everyone here agrees with you? But getting your guy out of prison is really more Lisa and Brian's area - you wanna come talk to them?" Then put up your anti-zonk field in case Bright does anything unwise with hypercharm.
[X] Get Brian and Lisa or whoever is immediately available and throw up your audio-visual filter in case Bright loses his shit and tries to mind-whammy his way out of this situation, get up on stage and promise Stonewall will put it's resources behind Sinclair, because his imprisonment is a load of shit, and then firmly escort him backstage where he's not screaming at half a million people.