A spokesperson for Virgin Media has said reports it plans to block, by default, any legal adult content are inaccurate, and that a Sunday Times article that says so is "fundamentally wrong".
The Sun published a report that says BT, Virgin, Arquiva and Nomad had signed up to an opt-in agreement to access adult content by 2014. "Eight million households currently using Virgin Media and TalkTalk's internet services will have to opt in to receive explicit material by 2014," it read.
But a spokesperson for Virgin said: "Last year, all ISPs committed to a code of practice whereby all customers, new, and soon existing, would have to choose whether to use the parental controls we provide".
"It's not default blocking and no customer will not know parental controls have or have not been activated," the spokesperson said, adding that Virgin Media confirmed it would be introducing a 'whole home' package later this year to work across all devices.
How effective even an opt-in for adult content option would be is up for debate.
A cursory Google search reveals streams of Yahoo Answers pages from kids trying to get around parental restrictions. When there's a will, there tends to be a way, especially when young people are often streets ahead of their parents in being tech-savvy.