I'm going to tell you that HOA's are nothing when you are modifying antenna setups. Most of the problems are engineering and city & county commissioners who like to make a stink about the smallest things. For new towers, that could definitely be a problem, but I guess in some cities, even modifications could run into the same issues. I know AT&T had problems in SFO when they started the 3G rollout because the older community went crazy thinking their brains would fry because of cell phones, and that delay was 6 months to a year.