Anti- family stereotyping.

I have noticed in media debates that anti-family campaigners are quick to select families which are married couples and blatantly use them as examples for having ill-served their offspring. No matter that EVERY survey on how well offspring do, the children of married couples always tend to come out on top!
Stop and think about this for a moment. If you were to use such tactics - let's say you commented on crime levels amongst Rumanian immigrants [ which ARE very high ]- the same people would scream at you that you were 'using stereotypes' and would probably scream 'racist' at you!
I believe the expression is called 'stifling debate'. It is also known as a double standard.