I absolutely hate those kind of parents/guardians on the playground, a weird hybrid of overprotective with too busy to pay attention. While I don't like my charges getting hurt, I let them run, climb, play with other kids, and such, because I want them to grow up independent and confident. If they fall, I get them up, and after a quick hug or a kiss to owie, I set them to play again. If there's blood, we simply go to clean it up and then with 'let's be more careful, ok?', I set them off. My charges know to stay away from swings, share toys, play hide and seek, it, play ball with others, climb ladders and tall slides, push marry-go-round, etc. When another child plays to roughly with any of my charges or the other way around, I correct them with a smile by saying things like 'how about we do it a little slower' or 'let's let the big/other kids play on this', 'let's be very gentle with the baby' or 'it's for big girls/boys'.
Has anyone had a bad experience on a playground too? What is your worst pet peeve when it comes to playgrounds?