I guess it does boil down to different perspectives.
True. Your perspective may be different this time next year.
My kids started MS (6-8) this year and I was SHOCKED at some of the things that went on at school.

DD came home many times asking me what certain words were (think C, D, W). My kids don't have virgin ears by any means, but some of the words they were initiated to in the hallways this year (and the context in which they were used) were just plain vulgar. There were also bullying issues from older kids in hallways, locker rooms and buses, and DD was severely harassed by a boy who wouldn't take no for an answer. This is just the tip of the iceberg (I could go on) -
and after great elementary experiences.
My sense of it (having both a boy and a girl same age) is that for many of these kids, it's their first taste of freedom and, as kids, they don't always use it wisely or make great choices when they're in a group or wanting to be "accepted" by others. They show off and/or have very few limits on their behavior and they know they can get away with it. (And for most, it's not horrible behavior, like serious bullying, for instance, although that cerainly
has occurred this year; it's foul mouthed juvenilism and bravado but is still obnoxious and hurtful at times.) I've seen some of this behavior with my own eyes from kids I've known since they were babies and I know for a fact that some of their parents would be completely shocked and horrified if they knew it was happening.
For kids not to be affected by it, IMO, they have to have a pretty good support system in place, good self esteem, and other, varied interests so that when one group is acting up, they can go to another group where they can be around like minded friends. (I feel sorry for some of the kids who may not have this.)
Many of our friends with kids the same age, especially the boys, were unaware of some of the things that went on at MS most of this year because their kids kept quiet about them. But once they started probing, they were pretty shocked, too. One friend of my son's was being harassed every day, every period at his locker by another boy but never said anything until his parents brought it up to him; he also admitted there were issues at gym and on the bus, etc. Prior to that they thought their son was having a great MS experience.
I myself attended a 1-8 school and didn't experience some of the things at school that my own children have. This has been a real eye opener for me.