Because dh thinks he can.
Local council charges £170 to paint white line on the road in front of our drive to stop inconsiderate bastards people parking their cars hanging over the edge. We are cheapskates and will not pay that. Dh has just come home from work and started twittering away about I knew not what but eventually established that he's considering buying some paint and painting his own line. H e reckons the council will never know. I being the sensible partner in this relationship think he's an idiot, of course the council will know and it's no doubt illegal to go painting random lines on parts of the road you have no ownership over.