My first instinct is to be against it.
Not only do I think "letting the younguns in" would be bad, but I also think there are certain subjects that men discuss with other men, and women with other women, and that line shouldn't be crossed either. I'm not sure how you would enforce this.
I have been on TJ for about 3 years now, and I love this place. I frequently chat and post more than my share of messages, but it doesn't take the place of church. Nor should it. This is a little hard to explain, but here goes a shot...
Some people watch church on TV. They say "church is church, it isn't a building" and while I agree with that, the church is a body of people.
I can't really tithe if I'm at home. (some churches let you "mail in" checks).
But I don't know that guy in the 3rd row, or that lady in the 5th row on TV, so I can't know how to pray for them. They don't even know I exist, so they can't pray for me. There is no prayer support, no encouragement from the body. I have no accountability to anyone, and no one has any accountability to me. How can I do a ministry from home? How can I show the fruits and share my gifts of the spirit to other believers (to edify the body) if I'm not around them?
I attend a small group (a bible study of sorts) and we know everyone in the group very well, we have dinners at each other houses, and call each other when we are sick, or traveling, or miss church unexpectedly. We help each other move, we know wives, husbands, kids and grandkids, and we have personal relationships that are hard to build on-line. (especially with an entire online community). I care for these people and pray fopr these people in a different way than I do with people I know from TJ.
While I have gotten to know a "very few" people well enough here on TJ that they pray for me and I pray for them and we share personal things, they aren't always the kinds of things I would recommend shared in a "public" forum.
My two (make it three) cents.