DS is 4.4, he's my PFB so i've no idea about most things especially slide etiquette. Have always tried to teach him not to climb up slides and when sliding down to wait until the person before has got off slide before he starts sliding.
Anyway today we have been to a well known pub chain for lunch and DS was playing in the garden after. There weren't many children about but then a couple of children turned up around the same time and i presumed they were together, an older boy of around 8 and a younger boy of 5, maybe 6. Anyway DS gets chatting to the younger boy and they end up playing together showing each other how they can climb on climbing frame and then they start playing tag.
Next thing they are chasing around and the younger boy has ran up top of slide and wants to slide down cus DS is chasing him but the older boy is climbling up slide so the younger boy just slides down anyway, there was no harm done the older boy didn't get knocked off or anything but then this woman comes storming over shouting 'you don't slide down slides when some one is climbing up are you stupid or something' to the younger boy. The younger boy didn't seen at all bothered and i sort of presumed it was her child and thought she was being abit harsh on him, if i had realised at the time it wasn't her child i would have said something there and then. But as we sat longer we sort of realised that the younger child wasn't with her at all, his parents were inside the pub (but thats a whole different topic).
With my DS and slides i teach him not to climb up, obviously sometimes he still does (because he totally ignores what i say) but if he was climbing up and he got a slight knock from someone climbing down i'd tell him thats what you get for climbing slides, i certainly wouldn't tell off the other child.