They can be the garden's best protectors. Plant raspberries, roses or other thorny plants along the fence as a barrier to fence climbers. Make friends with neighbors whose window overlook the garden. Trade them flowers and vegetables for a protective eye. Harvest all ripe fruit and vegetables on a daily basis.
Red tomatoes falling from the vines invite trouble.
Plant potatoes, other root crops or a less popular vegetable such as kohlrabi along the sidewalk or fence. Plant the purple varieties of cauliflower and beans or the white eggplant to confuse a vandal. Therefore your garden may want to allocate some plots specifically for children. Consider offering free small plots in the children's garden to children whose parents already have a plot in the garden. Usually the two are related.