Solution: landscaping.
Rip out every last bit of sod in the front yard. Find a nice selection of perennials to replace it with, some shrubs, etc. Make sure that the perennials along the property line are very fast growing and spreading types. Many of that type look beautiful, but once established, they're an absolute pain in the ass to eradicate. Your neighbor who whined - it's his problem if his grass is inferior to your flowers and loses the battle.
edit; ohhhh, I know! Bamboo can look quite charming and makes a nice privacy hedge.

Our neighbors when I was a kid had a small patch. 20 years later, my mother gave up the fight of getting rid of the stuff.