And this is exactly the issue. What a waste of infrastructure. I'm not even in the burbs, but outside the Toronto core with a bunch of one-way streets and virtually empty sidewalks during the summer and from 9 to 3 on school days. I was ticketed $105 a few years ago for riding (very safely, up against the curb) the wrong way on a one way residential street, and the cop told me he wouldn't have ticketed me if I was on the sidewalk. And even if I was ticketed, it seems to be a cheaper ticket. 

Note: it's actually safer to bike the wrong way on a one-way street. You can see the cars coming at you, rather than some super-quiet Prius sneaking up from behind.