According to the National Gardening Association, the number of households growing their own vegetables, fruit and other foods has tripled since 2008.

(Coincidentally, the number of households stocking up on earplugs to keep from hearing neighbors brag about growing their own vegetables, fruit and other foods has also tripled since 2008. But I digress.)

Since last year alone, multi-family community gardens have increased by 22 percent. Such gardens would spread even faster if organizers could weed out the “participants” who try to abuse the division of labor.

For instance, the “resear...