I must say I almost never had to deal with any of this. Which sounds like a blessing. I did, however meet this one guy and his family, when I was playing at a church. It was a revival, and I was new at this church, playing on Sundays. This was the first evening service they'd had since I have been there. So I never got notice whether I was supposed to be there ready to play for devotion or anything, but to not leave my new church high and dry I showed up.
They had the above mentioned family band, (some dude was on bass, the son was on keys switching back and forth to drums, and the guy on lead, switching to keys). I wanted to play rather sit-in, so his son could play drums. We started playing, and Im on a Casio w/ no pedal!!!! This dude took my plug out of my amp and put it in his bass rig and turned it way up. We're in this small hole of a church with painted brick walls bouncing sound everywhere. It was loud, and he's blasting his bass and now my keys. Seemingly try to 'play me' he also had his son play stop time to give the band solos one by one and they got to me finally. We wont talk about my chord/comp solo, but the next day of this revival, I brought my Motif and my bigger amp (to shut him up) and put it on the other side of me so he couldnt touch it.
Not to mention that a whole bunch of band solos in devotion to show is very much of a distraction to service. There werre too many issues to name that night.
Dude told me to call him so we can play together and work on some stuff.