When children are in a chat area they are in a very public "place".
They do not necessarily know the true identity of anyone they are talking to in the chat room.
There are two types commonly available: Plan B One-Step® (and others like it) and ella®.
You could be committing a criminal offence next time you discuss your deepest fantasies with someone online. That means it is therefore perfectly possible for the content of online chat, should a jury decide that it is capable of "depraving or corrupting", to be judged "obscene" - and as such for one or both participants in that conversation to be guilty of a criminal offence that carries a sentence of up to five years in prison, and a stint on the sex offenders' register.
A ruling slipped out quietly by the Appeal Court earlier this year, and lurking in the background while the substantive case to which it applied came to court, makes it plain: the act of publishing as defined within the Obscene Publications Act can take place with an audience of just one individual.
Many parents are leery of their children getting sucked into this alternate world, due to the number of pedophiles and perverts that have been caught preying on teens in chat rooms, posing as someone else.
Chat rooms allow you to meet many people you do not know, and while this can lead to fun friendships, it can also be a way for people who mean you harm to gain access to you.