Just yesterday, I was at the Queen's Quay Terminal with a buddy of mine who lives on the Harbourfront. We were watching kids skateboarding, doing their thing and filming each other. Fun to watch, like any other sport. My buddy asked me: what kind of people have a problem with this? Who are they hurting?
Shortly thereafter, a douche-bag of a security guard (yeah, yeah, doing his "job") came and kicked them out....oh, and wouldn't even let them sit down and chill. We had our answer to the first question.
The answer to the second question is, of course, nobody is hurt.
Loud noises emitted from wheels? Do you have overly-sensitive hearing by chance?
Buffering the floor in a common area annually? A common occurence if there ever was one and one that's been going on for longer than kids have been skateboarding.
You seem to have an irrational fear of being hurt by skateboarders.
Have you ever seen any bystanders getting hit by skateboarders?
We're going to have to put this down to a generational difference and misunderstanding, I guess. Though, I will repeat what I said earlier: it is almost intuitive that rollerbladers and skateboarders belong on sidewalks with an imperative to share the space with pedestrians. Simple concept, I'd think.