You’re on the right track and I’m glad to see tcr is coming on board. The real solution though is carpet bombing. Some Napalm and a little 50 caliber covering fire should get you started. Can’t let these agri-terrorists get a foot-hold. Agent Orange will prove very effective at the end of your initial encounter.
The spiteful part of me would want to get a few friends together & trap him overnight. Ya know, get 4 other friends, one park on each side to trap him, & then the 5 of you carpool home & back to work the next day. Might break him of this arrogant habit.
I know, I know, probably not the right attitude, but it would make me laugh.
Number 10 million & 1 why I live in a condo! No yard issues. However I was just griping to a friend last night that the yard diagonally across from my condo building has tons of dandelions that are 3 feet tall.
I say spray away! At least in the parameter of your lawn.