Well for apartment buildings and empty balcony rules, yes, its the landlords.

For the outdoor laundry, its bylaws. Basically what happens is nosy neighbors report you, then a bylaw officer comes by and tells you someone made a complaint. It’s called a “Nuisance and unsightly premises bylaw.”

My town in Alberta, Canada. It actually used to be banned in a lot of Canada, like all of British Columbia, and Ontario. Old-fashioned people think it makes a neighborhoods look “trashy” and start going on about property value.

It’s sort of like how a huge amount of apartment buildings don’t allow anything on balconies because it’s “unsightly.”

Haha sadly, hanging your laundry outdoors is illegal here(also, it would freeze in winter), and indoors it takes forever to dry ╥﹏╥

I could be wrong, but I believe pilling is most commonly caused by friction (for example, where your legs rub when you walk), so one thing that would help is not washing clothes that tend to pill with clothes that have hard things like zippers or buttons. The balls might help by cutting down on the time the clothes rub together with the air-gaps they create, but I am not sure.

I have been told before that you can remove pilling with a razor, but please look it up before you try haha.