Your Supervisor wrote:
Total nonsense.
I live in Boston and the more lawless the neighborhood, the more seriously people take these make-believe rules. There are laws about driving and parking and if cities want to pass laws about shoveling, let them, but otherwise shovel yourself out and find a space when you return. However, some of these idiot neighborhoods, like South Boston and maybe yours, do pose real threats to yourself or your car, so beware. Take it as an indication that you live in a bad neighborhood, don't ever buy or raise kids there, the people are lazy morons.
Dude, it's the law in Boston if you shovel a spot, you get to keep it for two days. Look it up, it's on the Boston city government site. It's not a made up rule.
Rip on neighborhoods if you want, but it's a perfectly reasonable policy. You work your ass off in the morning clearing a spot, why should someone else get it when you come home?
And at least 5 Harvard professors live on my block, that I know of. Not really a neighborhood of morons.