I'm afraid I see the other side of the arguement... we suffer with people parking outside our house rather than pay for parking near by. What annoys me is that they don't park in a responsible manner - so for example outside my house the road is very narrow (we don't park outside our house except for unloading and loading), 2 weeks ago we didn't get our bins collected as a car did park there nor anyone else beyond us. And that's not the first time.
We do get the police to ticket or move cars occasionally due to obstructions. One of my neighbours regularly needs paramedic/ambulance. There have been times when they have difficultly getting through.
We get people parking completely on the pavement as the roads are so narrow too, which means walking the kids in the road to get to school. And no when we first moved in we didn't have these problems but just think how much busier the roads have got in the last 20 years.
I do know that one of my neighbours does put notes on cars - but I don't. However he will put notes on cars outside my house which they sometimes then post through my door!!!
I'm not saying what he did was right, but that he could be getting very stressed by it, day in, day out. I normally let most of it wash over me and just report the worse cases. But sometimes I think they must have a file with my name on it at the police station with moaning loony written on it!!