I may well be being v v v unreasonable as I've had very little sleep and am feeling pretty grumpy!
I took my two young children to a small playground near our house early this afternoon. It's good because it's fenced off and doesn't have very much there so doesn't usually get very busy. We arrived to find an entire school class of 30 kids there with about 3 teachers or TA's. They basically took over the entire area meaning mine and the other small children there couldn't play and so we had to leave. They were being very boisterous and hogging all of the playground equipment. Most of the time they were not even using it properly but seemed to be playing The Walking Dead. They were only about 7 or 8 so I was shocked they even knew that show! Anyway it meant them using the one slide and small climbing frame as their "base" to jump off and congregate on. So the little one seems there felt a bit intimidated and obviously it wasn't that safe as children that age don't think to watch where they are going.
The teachers sat at a picnic table chatting. I've been to the school they are from and they have several nice playgrounds with their own equipment and activities so I'm really not sure why they were there. I know it's a public space and they had every right but they took it over completely. We were not the only people to arrive and then leave because of them.
So aibu to have been a bit annoyed?