We try to stay to the right (assuming we're in a country with the same walk on x side rules, LOL), so staircases are going to be the same.
Going up on slides is an ABSOLUTE no no for us. It's possible, that if we had a place with a backyard, and had a slide, that I would let that, ha, slide, but since all we have are public parks, NEVER.
We were at the park recently and despite seeing plenty of adult bodies sitting on the sides, we were the ONLY parents trying to keep children from being smashed by kids going up. Our son, thankfully, managed to both see a tiny mite of a girl and hear us warning him to stop, and he could'nt stop BUT pulled his body to the side and grabbed on to the side of the slide, so he didn't smash her when she decided to go up a spiral slide AFTER he'd already started down. It was that moment that all of us decided we'd had enough...if someone can't even tell their tiny 2 year old to not go up a slide, when there is a steady stream of kids going down, and an obvious contingent of big (and some little) kids going UP, we didn't want to be there. Slides are for going down. There's plenty of climbing equipment out there.
In addition, the shoes get the slide dirtier than they should be.
We don't have a backyard, and I'm not letting anyone go barefoot at our local parks. Bleah. If we had a backyard, and if DS wanted to, I'm sure he'd go barefoot. I certainly did while growing up!
The first two, I believe, say that we are very very mindful of others, and we don't want uncontrolled chaos going on. Kids who go up the down (and note that we see it ALL the time, so obviously we're not seeing you guys...but with a spiral slide you don't KNOW who might be at the top, once you've started up, and those at the top don't necessarily know who is coming up) are pretty much cutting in line (b/c they go up then down, almost all the time), and I just hate that.
The other wto are just circumstantial, that we don't live in a house.