Most chat programs include the option to send private messages, or chat one-on-one.
You may meet someone online who seems sympathetic and understanding, who gives you advice and seems to be your friend.
They do not necessarily know the true identity of anyone they are talking to in the chat room.
Those who would wish to harm children can prey on those in chat rooms who appear to be left out or lonely.
The anonymity of chat rooms can encourage some people to harass others.
More than any other place online, chat rooms are grounds for pedophiles and other predators trying to make contact with young people.