They also got to my lettuce, but spared my beets and the beginnings of my carrots!

At some gardening stores are different animal urines. You might try them, I'm thinking fox urine to keep away bunnies, I've never tried it myself. Bunnies are difficult though once they find a yummy patch. I've also heard of sprinkling blood meal around the garden or spraying the plants with a mixture of water and cayenne pepper..though you might not want spicy lettuce either.

Try getting some blood meal and mixing it with a little water in small open containers such as margerine tubs. Sink the containers into the soil among your plants. As the solution evaporates, add a little more bloodmeal and water. That way when it rains, the blood meal (nitrogen) doesn't go directly into the soil in large amounts.

It stinks, but it DOES work. I have seen rabbit droppings around the edges of my garden, but NONE near my veggies.

Blood meal is a deterrent to rabbits. Be aware that it is a high nitrogen fertilizer if you sprinkle it on the ground. That may or may not be a good thing in your situation.

Apparently your community garden is unfenced or not effectively fenced. My experience is that rabbits can be kept out with a minimal fence. Is it possible for you to fence your own plot, at least during the growing season?

Jim

A chicken wire fence is the best deterrent. I'm using four foot wide chicken wire and laying a foot of it flat on the ground and so far, so good. You could just fence the beans or include whatever else you are growing which is attractive to bunnies. Use four foot wooden stakes as fence posts - they don't have to be very husky.