If it's just websites, not a problem.. I have lots, and several folks know about it, including a deputy, state trooper, and an elder at the neighborhood Church of Christ.. He had me design his church site as well.. go figger..
But it wouldn't matter who knew about it.. it's not illegal to have adult websites.. Just might be looked down upon by a select few folks.. but that's true no matter what state you are in..
As far as neighbors getting nosey.. E-Town is kinda spread out, but if you maybe have a mainstream site, just tell em you have online bidness stuff goin on and talk about that one..