I've posted on this topic, age-segregation in the church, in both April and August of 2010.
Now, Tim Challies has posted this very interesting review of a movie made by a group opposed to age-segregation in churches. Its a great example of how to take a good idea and add an 'ism' and make it a bad philosophy.
It was also a nice eye-opener to me about how things I say could be taken to an extreme, even unintentionally. We all have a bit of that fundamentalist thought pattern rooted into us, even liberals, and I'm no different. So I hope what I've said about this in public isn't so extreme as to make it a test of faith or fellowship. Its not. It is important, but not a test of faith or fellowship.
All things in moderation, as they say.
*Legalism- making firm prohibitions where there are no biblical prohibitions...R. C. Sproul's definition.