Looking at Section 1.2 of the report it says:
"Most risks are encountered by less than a quarter of children"
"The most common risks reported by children online are communicating with new people not met face-to-face and seeing potentially harmful user-generated content. It is much rarer for children to meet a new online contact offline or be bullied online."
"Significantly, risk does not often result in harm, as reported by children. Being bullied online by receiving nasty or hurtful messages is the least common risk but is most likely to upset children."
"Sexual risks – seeing sexual images and receiving sexual messages online – are more encountered but they are experienced as harmful by few of the children who are exposed to them"
"1 in 12 children have met an online contact offline; this risk rarely has a harmful experience."
"Among those children who have experienced one of these risks, parents often don’t realise this [...] Although the incidence of these risks affects a minority of children in each case, the
level of parental underestimation is more substantial."
In other words, the kids *are* pretty much alright, but the parents are ignorant and need to take a bit more notice of what their kids are up to online.