We're on a small, busy campsite, with most spaces filled. Lots of families around. All good. Don't expect peace and quiet BUT there's a few families near mine with boys aged roughly 4-5 and they are tearing around absolutely screaming. No exaggeration. Not happy laughs, or shouting that goes with loud campsite games. Proper screaming. Calling each other's idiots was another lovely addition to the screaming. 
All the tents are pitched against the edge of a field, with a lovely area in the middle to play, but they insist on running around everyone's tents, weaving in and out. I had to tell them to stop jumping over my guy ropes and keep away from the back of my tent (didn't want them to hurt themselves or my tent!).
My kids are settling down now, chilling out in the tent, but the screaming goes on. I know quiet time isn't till 10-10:30, but surely parents can understand that not everyone wants their kids running around other people's tables while they eat? Or are sitting chatting to their family?
It's not just one family, so it's not like you could have a quiet word.
I don't know if IABU and just a grump, or this is the new acceptable way for things to run in campsites (I've not been for about 4 years!).
Anyone else camping? What's it like where you are?!