Yes, we are currently fighting this battle. It's been just as icky as I remember it being when I was a kid. My kid is too young to know what is so yucky thankfully, and since there is the whole resistance issue now, I'm thankful that I don't have to use chemicals on her.
Unfortunately it means that to fully eradicate them will take so much longer-its a real pain.
Whoever mentioned that they cannot live away from a host is correct-they can only survive a few hours at most because they dehydrate. But in many schools the time between recess/lunch and other breaks means that coats are too frequently on and off for them to die in between.
Really though with a four year old, head to head contact is more of a problem, as I've seen her sat with friends almost hugging, and head on head. Easy path for transference.