We wouldn't want a loud generator being used too many hours at a time close to us in a campground, but then again we don't like other campers (except for traveling companions) close to us in a campground anyway - whether a hookup campground or drycamp campground. We prefer being a long way away from other campers - so far away that most any kind of generator doesn't bother us if used a few hours here and there.
Given the above scenarios ... we don't mind generators ... they're the sound of complete camping independence -> even from the sun. Generators allow us to be able to camp any time of day, anywhere, any season, and at any altitude. RV time and RV $$$ are too precious to have to follow the weather or hunt for hookup campsites.