But major net service providers have criticised the action as "irresponsible" and say it is driven by economic concerns rather than keeping children safe.Net experts have also warned it could drive vulnerable young people to other unmoderated chatrooms on the net.
MSN's one million plus chatroom users are not going to stop using chat," said a Freeserve spokesperson.
They added they were bemused by the reasons MSN have given for its action.
"We know about the problems of chatrooms but the answer is not shutting them down," they said. Chat rooms in themselves do not drag in a whole lot of money," he added.
Microsoft's decision to close the free, unmoderated chatrooms of its MSN internet service has sparked strong reactions.
Children's charities have welcomed the move as a positive step to ensuring children's safety online.