Mr Gamble said: "Children can contact us if they are worried, they fear about someone's intentions.
"Parents can be reassured because they know this environment is appropriately managed, with engagement with authorities ranging from the police service, including Ceop, right the way through to Childline online.
"And the predator, the person that goes on with harmful intent - whether it's the bully or whether it's the paedophile - they know when they see it that there is an active deterrent here."
He added: "I am applauding Bebo - it's taken us three years to get here. But I don't understand - and there is more than Facebook in this - I don't understand the logic for the others not following suit."
Several sites including Bebo, MSN Messenger and Facebook already give users the chance to alert staff to abuse, but now Bebo has gone further by adopting the Ceop Report button itself.
Bebo said it was "committed to providing its community with the safest possible environment" and its decision was praised as "very responsible" by Sir Hugh Orde, president of the Association of Chief Police Officers.
"I can see no reason why other sites would not consider adopting the same approach and would encourage them to embed the Ceop Report button for the benefit of all users," he added.
With the kind of power Facebook has, some are asking: does it have a responsibility to answer its critics - especially when it believes that their criticisms are wrong-headed?
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