As a childless woman in her mid-30's, I take issue with this comment. I run a successful business that supports the livelihoods of a dozen people, I volunteer and am a an active community advocate, and I teach, among other things.
My decision to not have children is so I can focus my attention on other economic contributors and keeping my team employed. I'd hardly call that "dicking around without responsibility."
I didn't like LinkedIn for a long time (I much preferred Twitter) but since becoming a business owner I've appreciated having a place where I can go and "talk shop" and connect with other business owners going through the same things I am.
Maybe it's just that I've cultivated the right community, but at least 90% of the content I see on LinkedIn is interesting, personal, and thoughtful. I much prefer it to every other social network I use.
My decision to not have children is so I can focus my attention on other economic contributors and keeping my team employed. I'd hardly call that "dicking around without responsibility."