I don't think I'd ever be annoyed at neighbor req from people off of the forums, provided they read my posts and try to add me bec they have a similar playing style as I do.
For instance, I recently had a person add me off the forums on bakery and restaurant, and they had two accounts each. Even if they missed my preferences on the forum, my wall clearly states what kind of player I am. They proceeded to send me red gears on restaurant and paint on bakery, bec that's what they needed. Many people like to have neighbors just gift them what they need and they'll send it back, but I don't play like that. To have a new neighbor assume or hope that ill send them back their preferred gift just left a bad taste in my mouth, especially when I make a point to tell all new neighbors if they need anything to let me kno on my wall or to post on theirs what gift they'd like. Needless to say, all four accounts were deleted. I don't have time to explain something I've already explained one million times. o.O