OMG LOL!
honestly reading this thread kinda saddens me. If the dog is a pup they like to explore, More importantly you shoudl introduce said dogs on neutral ground if possible. This would help prevent agressive behavior.
As for all the adovcates of using Tasers/Guns/Pepper Spray keep this in mind, If you hurt the dog and the owner has to spend money on vet bills its possible those vet bills will become your problem.
Ideally if you've tried to talk to the neighbor and ZFG, I'd put it in writing and CC the HOA of both your community and theres. If this continues you could reach out to animal control.