Earlier this week the UK clinical psychologist, Professor Tanya Byron, warned that parental paranoia about child safety could expose children to greater risks indoors. She warned that by denying (拒绝) children the opportunity to play outside, they are likely to face greater dangers inside from the Internet.As we can see, there are far fewer kids out and about on street corners or in parks unaccompanied by adults. Obviously, the drive to reduce risks in children’s lives has been firm.So, in trying hard to keep their loved ones safe, are parents denying children the freedom they need to develop and grow up? Quite possibly so. There is a real danger that by over-protecting and over-supervising (监督) children: Society could be denying children the opportunity to grow up into capable, confident adults. But we should not blame parents for this. Parents are constantly being overwhelmed with warnings about the dreadful things that can happen to their children if they do not keep a watchful eye on them.Now parents are asked to worry about the risks awaiting indoors when their children go online. But should they?A 2006 national survey of teenagers found that more than half (55 percent) of US youngsters between 12 and 17 years of age use social networking sites such as Myspace and Facebook. Tanya Byron admits that the “concrete evidence of harm resulting from the Internet is fairly limited”. Also, a literature review in 2008 shows that “there is a lack of information about any actual harm experienced by users of social networking sites”. So why all this fear?Of course, where there is freedom, there will always be “opportunities” for abusers and criminals. But every aspect of our lives poses potential risks, which ultimately we all need to learn to negotiate rather than try to eliminate. As Danah Boyd, a social media scholar,said at a conference, “There are potential risks on Myspace but it is important not to exaggerate them. The risks are not why youth are surging to the site. To them, the benefits for socialization outweigh the potential harm.” Boyd argued that, although letting go and allowing youth to deal with risks is terrifying for parents, “it’s necessary for youth to mature”.In arguing that the Internet has limited harm on children, the author ________.