Buying Tax Liens on HOA Common Areas

[Estes Real]

I've noticed various homeowners associations have failed to pay the tax bills on their common areas. I assume in a good neighborhood, it is just an oversight and they will eventually pay up and I could collect all the interest. However, what if they don't pay? What good is it to own an HOA park? Can I try to sell it back to them if I have to foreclose? Sell the residents a yearly membership fee to go to the park? Put up no trespassing signs and cut down all their trees if they wont buy the land?