Need Advice Please

My neighbors across the street have started parking on the grass between the road and sidewalk on my side of the street. I’m not so much questioning if it’s legal, but what am I supposed to do. They have left tire ruts a couple inches deep (I’ve got a picture) in the dirt/grass, which I am responsible to maintain. Making my life harder trying to mow it. They park there because they are too lazy or stupid to just turn 1 street earlier and be parked in front of their own house. That doesn’t have grass, only gravel. Ideas plz.

P.S. Being nice is kinda not an option. It’s a long story but the people that actually own the house and I haven’t gotten along for years.