We have one, explicitly set up to maintain common ground (wetlands), retention basins and storm drainage. Couple years ago, they tried to regulate trash collectors, and restrict residents choice of trash collection contractors. I put the kibosh to that, and was public enemy #1. Much to their dismay, I read the CCAs and knew the HOA's limitations. Someone didn't get their commission from the favored contractor.
BTW, I don't like avocados either