

At my home venue, I have no protection. If you fuck with me—particularly within the first twoish songs of a set—my usual response is to look them dead in the eye and say, “Where do you work? I’m going to come to your job and help you on Monday.” And that usually scares them off.
Sometimes, I feel bad about it and will find and apologize to that person later, explaining why I reacted like that.
My favorite is when it’s a local/college-age band and parents are around. Or spouses of older band members. “No, I can’t get her vocal any louder because she’s whispering six inches from the microphone and Jimi Hendrix up there is blasting his amp at 11.”
All this said, it’s a common misconception that “asshole” is the default mode of operation for a sound engineer. It’s just that the job is fucking stressful, and if you catch us at the height of that stress, we will react poorly. I’ve definitely come across a few grumps, but most folks are nice on average — kinda have to be so that people will want to work with you. Most of us just want to work with the team to make a good show happen.
To your original point, it’s 100% true that the better the artist, the better/easier the mix. Can only polish a turd so much before it crumbles.
Good idea on just homebrewing a baffle!
I normally just ask them nicely to turn down, if they can do so without sacrificing tone, and otherwise encourage them to point their amp towards the curtains.
I’ve definitely seen some folks prop their amps to angle them toward their heads from time to time — I’ll start working that suggestion in for sure, since every little bit of db decrease will help in that small room.
I also want to get a set of ClearSonics or similar for cymbal wash. May not be able to use them all the time (stage real estate is at a premium), but they would be nice to have.