There are mufflers and then there are mufflers How often do you hear about people removing the baffles from their mufflers? How many people get after market mufflers that end up making the engine louder? I don't run gassers in my planes, but the ones I see, and hear, at the field are way louder than my weed eater or leaf blower.

Clubs that are close enough to residential areas would do well to enact, and enforce, clear noise limits, rather than just saying all planes need mufflers, before it becomes a problem. If some of the members have planes that can't be quieted, such as turbines, perhaps they could work with the neighbors to define reasonable times for operating them.