After watching from adjacent courts, half of the guys in my league foot fault on every first serve. Of those 50%, half have weak serves, so I don't care.
The other guys, when there serve is going in, are tougher to handle. And some of them play S&V, which means they are getting a double advantage.
I've resolved that I will start foot faulting intentionally against these guys if I start losing. I tried it once against a blatant foot faulter last season, and I hit twice as many aces as I normally do.
The alternatives: bringing it up, or letting them get away with it..don't work for me.