One of the most important issues is the use of blowers. Of course, the gardeners of the adjacent properties do the same, blowing half back and half the other direction. I can determine algebraically that if leaf litter is divided approximately in half at each address, about one of every 32 leaves that falls from the gingko tree in the fifth garden to the south should eventually arrive here. That may not seem like much, but in conjunction with all the other debris in the neighborhood and leaves from trees I have never seen anywhere near here, it adds up. It is imperative that gardeners dispose of debris properly.
Tactful etiquette is also helpful.
For example, dust should be blown from cars that happen to be parked in a blown area. One should also be observant of open windows. Although most gardeners know how to use a mower properly, other power tools may be as offensive as blowers. For example, the gardener next door nearly killed two mimosa trees I planted a few years ago by removing much of the bark and cambium with a weed-whip. The same whip eliminated alyssum growing at the base of an unsightly retaining wall.