I've even encountered, though as a customer, central/community heating plants and distribution systems - they are quite common in northern Europe. 

They change the rules (including whether or not you can continue to rent out your unit), they change the amount of the dues, they harass you about the plants you have on your patio....Take it from one who bought a condo expecting to live there forever, and sold it two years later - because of the HOA.Condos are also harder to finance, so they're harder to sell, too.

We usually hang shower curtains, add throw rugs, hangers and gift bags with tissue paper, a plant and door mat at the front door and lots of air fresheners.

We have asked for a fence to be put up because their dog has gotten onto our property, urinates on our plants and has nearly killed one of our cats.

An example would be the huge Boeing plants.  

You might have to allow them in, but with an agreement not to smoke.Another problem with MJ users, is that they will often want to grow their own, which is part of what's often allowed - so many plants, etc. 

Next month they may get a new yard nazi who hassles you about your potted plants and who knows what else.If you can avoid ever having to deal with a HOA, that's my suggestion. 

And they're not afraid of people.I don't have to deal with the mess, as I'm just a tenant now, and I don't have to deal with any damage to a yard or plants - I don't have a yard or even a balcony. 

A major component of these solar companies operations is selling the energy / EPA credits  - to companies that pollute (oil refineries, coal fired power plants), and when they buy the credits it allows them to pollute that much more.  

Plant willow trees, they'll dry the place up