If he set your input levels nice and high, and especially if he's running a digital board, then it is total nightmare until he pulls that input level down.
There's a lot of digital boards out there these days. Max input is a brick wall. If you try to sneak your level past it, it instantly turns to complete crap. This is something that was a headache for a sound man in the old analog days, but now it's Epic Fail. If you teach a sound man not to trust you, you can bet he wont, and he will always keep your level so low that he's certain he has enough headroom for whatever you pull on him. Teach him to trust you, and then he can concentrate on simply trying to get your level to where it sounds best in the mix.
I seldom am running into a PA, but whether I am or not, I use a volume pedal and set it at absolute max in sound check and pull down from there for the set. If I played softer with my fingers it would give me more dynamic range just from my playing, but I don't, so I use the pedal. When I'm running a board, I ask everyone in sound check for the loudest thing they're going to give me, and if I discover they knowingly screw with me on that, they immediately become my last priority. No trying to "get even;" it's just that I can't help but give more of my attention to the musician's who deserve it.
This is why digital mixers (as well as analog mixers) have this nifty little thing called a gain (or trim) knob, and they can even have this other neat little device called a "pad".
I have never in 4 years of doing sound had a signal that was so hot that it would clip even with the pad on and gain knob all the way down.