The farm in question will be stripped bare in no time (probably at night) - if not by the hundreds of residents, then by animals.
After the first crop, the place will go mainly to weed, but half-hearted efforts by a handful of residents could get in a second season crop, and yes, some hippy snowflakes will be out there pulling various insects off the plants and hand pulling weeds until they get dirty, get bitten, break a nail or all three on the same day - suddenly there will be other things to do like go to Wholefoods ....
I used to have a nice apricot next to the street. Every summer I would wake one morning to find it stripped bare by nighttime thieves. I finally tore it out.