There are some people out there, particularly older people 40+ish, who seem to be incredibly bothered by others parking infront of their house, bordering on mental illness. When I was a student I got it in 2 of the 4 student houses I lived in, the first time the aggression of the accusation took me by surprise to the point where I assumed I must have done something wrong, but after walking away having taken note of the issue, I felt like a right berk for letting someone speak to me like that after realising I had done nothing wrong. I didnt change my parking and nothing more was done.
The second time, now fully clued up, the next guy who got aggressive/annoyed with it was simply met with the same aggression and wilted instantly, started spluttering about how he thought I was someone else and the whole shebang. I think it's a generational thing, old people realising that younger people are now adults as well. Bloody entitled baby boomers, the worst generation of people to have ever lived imo