Yep, DaddyJ. Adults will always find something to blame for corrupting their teenagers. Anything except their own parenting.
I really don't understand what parents who are censoring what their children see are doing?
If it's about drugs, alcohol or smoking, surely those are good things to discuss?
If it's about violence or swearing, what are you worried about? That they'll copy the behaviour? That they'll be upset and disturbed?
Actually - I was annoyed that 'Are you Smarter than a 5th Grader?' (the US equivalent of '10 year old') had clips of WWE with men kicking each other in the face because it did look imitable and showed no consequences. There's a big difference in my view of seeing 'real' people do something and seeing pixellated graphics doing it.
If it's about sex, then again, what are you worried about? In the US, everyone went loopy after Janet Jackson's wardrobe malfunction. A flash of nipple is enough to get a mature rating over here and you never see nudity on tv.
I'm not saying you shouldn't worry - but you should know WHY you are censoring something you don't want your children to see. I don't think you should show your child things they'll find upsetting or terrifying, but some edgier things can make for a good talking point.
Relying on certificates is lazy.