The real reason they want him arrested is because it makes them all look like shitty parents for not building their kids tree houses, and cuz he raycis fo not building dem tree houzes too.
Some rich neighbor is pissed off about it and is complaining. Apparently they "know someone" so something is being done for the first time in almost 30 years.
This is why it sucks to have a shit neighbor move in. They randomly can become a piece of shit and make everyone hate them.
Go full on malicious compliance on that POS. Report them (and get your neighbors that liked the treehouse) to report them for anything and everything. They will move away in a month.
Have a group of well planned, well organised men show up at the asshat neighbors house and build a tree house on his property in 5 minutes (when nobody is home) and then just walk away and say nothing.