goodnight and OP I said that small kids should be "helped to hide in a discreet corner, as far as possible from play equipment, so no one has to see or smell them. Sometimes children get caught out and just have to go quickly; this is not shocking".
So no I never said that I was "ok with my own kids accidentally rolling about in another kid's piss".
My point was that sometimes kids need to go quickly and I think it is fine for them to pee in a corner; this is no worse than a dog having a wee.
I have never seen anyone pee in the middle of a playground right next to play equipment. That is not a norm anywhere I have been (three grown kids -lots of travelling to foreign playgrounds with them).
I thought maybe OPs obvious delicacy when it came to writing the word implied that she saw the usual fairly discreet peeing that occasionally happens, as more horrifying than I would have found it.