Does it happen very often, then?
Re building and renovating, yes, I'd say it happens all the time.
There's always disputes about a neighbors fence being 3 inches over someone else property line, driveways, sidewalks, how far you can build from the street.
Sometimes when looking at a map of your plat of land, it's not accurate to the inch, and doesn't jive with your neighbors.
To be honest, I would never have made trouble for my neighbor over 18 inches...although that difference would seem to me to have been noticed by inspectors during the process.
Even if I didn't like him, I couldn't see myself making someone pay all that expense. Seems vindictive.
On the other hand, I see the retaliation as downright childish, and not at all funny.
I have a deep rooted disgust for that particular hand signal. I've never found it funny, and whenever I've seen others do it, it makes me think they are very base and low class.
I'd no sooner put vents on my house in that configuratin than tattoo a giant vagina on my face.