I don't blame you. You have to watch out for Frank, yourselves and it's just rude.
We have the same problem with our neighbors dogs. I make sure to never let Ruthie and Brutus out with their 4 dogs because they just stand at the fence and bark. We can't even enjoy our yard and deck in the summer if they come out to potty, it's incessant barking. Drives me nuts. They also do nothing with their dogs and they are terriers...I tell them all the time if you would just walk them, they wouldn't bark as much but that goes in one ear and out the other.