I've told you about my pet peeve of people bicycling on sidewalks, especially where you actually can get ticketed for it like in downtown Portland. (Not that that's enforced, but it's on the books. Plus I have a feeling that if I biked on those sidewalks, I'd be the one who got cited. Meh.) But I can't tell every, single, bicyclist I run into (not literally. I hope not literally) that it's bad manners at best and dangerous at worst to bike on sidewalks. That does not go well. I know from experience. So instead I stew.
Or, stuff like this goes down: I see someone bicycling through a narrow spot of sidewalk in Pioneer Courthouse Square this afternoon, and imagine myself excitedly running after him yelling "HUGS! HUGS!"
When I get annoyed, I get weirder.