Atkinson seems to be concerned with children getting a hold of violent or sexual games, because he believes they're harmful to children. But there are all sorts of things that could be hazardous in the hands of children that haven't been outlawed; I don't think that's the real issue at play here.
Video games make a convenient target because they're a form of cutting edge media that becomes increasingly sophisticated practically every year. A Clockwork Orange, for example, contains far worse content than any video game I've played, and yet it was released a long time ago and has essentially been accepted as a classic mainstay of film.
A lot of people would argue it's the interactivity, but the way in which you do interact is so incredibly crude that the argument takes a lot of stretching. You're pressing circular buttons and moving analog sticks to perform these various tasks; there might be a case to be made if I was playing a first person shooter with a gun that was very realistic as the controller, was capable of doing horrific things and receiving a lifelike response, and if the graphics were incredibly lifelike. But even the most bloody interpretations I've seen of real life violence come off as at least slightly comical in the video game medium; especially if you look at them for very long.
That's why people become so desensitized to video game violence; because to the trained eye it's an absolutely preposterous comparison. So many of the claims people make about games from GTA to MW2 are wholly sensationalized and taken entirely out of context.
People say you get to be a "virtual terrorist" in MW2; no, you actually get to be an undercover agent who is posing as a member of a terrorist group, who does not have to shoot anyone. The player can get through the whole level dodging any violent encounters if you're playing on a lower difficulty without any problem. Not to mention you can skip the scene enitrely.
And they loved to make a big deal out of the having sex with prostitutes in GTA3; but there was no real incentive or point to doing this, it was quite honestly boring and a waste of time. The Hot Coffee mod in San Andreas (I think it was...) required you to "hack the game" in order to access it, and many people made it sound like it was shipped with the game and intended as content. It was simply an artifact, inaccessible unless the user violated the way it was supposed to be played and quite possibly the EULA.
The Media's coverage of gaming controversies is notoriously unfair, much of the populace has no respect for the truth when it comes to this hobby, and this isn't going to change unless the demographics of who plays games starts to shift and said gamers get more politically active. The first is happening; we'll see about the second.