In the UK it's kind of like - kids don't wander about alone because they might run into baddies, and now adults are afraid to interact with kids because they might be seen as a baddy, and this kind of loops around until no-one is interacting.
Basically, it's like any adult man is seen as a potential child predator, when in reality it's some tiny tiny fraction and in an ideal world we would be able to assume that they get sectioned / locked up quickly so we don't have to worry about it.
Meanwhile I can travel around many parts of Asia, for example, and parents and children alike have no issue interacting with strangers.