As MG says little things can mess up peoples day. The note writer may be a knob making a big fuss over nowt or he could have been seriously inconvenienced by the OP I dunno but parking on the pavement is a no no, parking on the pavement to leave room for a car (or bus) to pass because someone else is parked opposite is no excuse, just don’t park there at all. I saw plenty of pavement parking so used to think it wasn’t a big deal then someone pointed out to me what a PITA it is for people.
One person parks with wheels just on pavement to allow road use the next person takes their cue from them but has a big SUV so has to park fully on the pavement blocking it completely. We need to set a limit somewhere, so where do we draw the line? how about no wheels on the pavement at all?
Last week lovely weather, road passed the local park, double parked cars everywhere, both pavements impassable to anyone other than able bodied people (and slim people at that!) Lot’s of people don’t give a shit where they park but as soon as you start having a go it seems every driver feels threatened so tells you to “chill, it’s no big deal”