Hi.
These kind of stories may sound extreme to the younger players and/or to those who haven't gigged that much outside the "safety zone" but for us more seasoned players they're nothing new.
If You think it's bad for the musicians, ask the engineers
Audience:
WOW, that's
a lot of knobs.
Do You actually know what every knob does?
WOW, that's
a lot of wires You have.
What would happen if I'd cut one of those wires?
The ____ is too loud, turn it down.
The ____ is too quiet, turn it up.
Too much/little highs, turn them down/up.
Too much/little lows, turn them down/up.
The drummer is too loud, turn him down (acoustic, unamplified set).
I used to do sound for ____ it would be foolish for You to ignore me.
I used to be a roadie for ____ it would be foolish for You to ignore me.
I used to be a truck driver for ____ it would be foolish for You to ignore me.
What kind of instrument You're playing there, a synth?
WOW, You're composing well. (A light engineer operating an analog controller)
The musicians:
I demand to use DI/mic (everyone, not just bass/keys)
I refuse to use DI/mic (everyone, not just bass/keys)
I want to use a cheap Shure55 knock off because it looks soooo cool.
I don't want to raise/tilt my amp/cab, because it's too loud/earpiercing then. (mostly guitarists

)
I want/demand You to make us sound just like in the recording. (which had about dozen vocal and guitar overdubs)
Could You run this tape (yes youngsters, a tape) in the beginning and end of the each set? (no prior warning or anything)
Turn us up really loud because the headliner has to be louder than everybody else.
The list is really endless, here's just a few that I remembered without digging too deep into my memories from the semi-pro sound engineer life I once had. Not all them are too pleasant

.
As the sound engineers who have done gigs across the spectrum know, there really isn't too many new things that get asked or demanded.
Regards
Sam