I've been on CafeMom for 9 years now, it has its good groups and it has its not so good groups.
I have found a couple of very good supportive groups, and then there's Mom Confessions. Yes it's not all unicorns and rainbows, it's more of a gloves off no holds barred type of group. But, I've also seen this group come together and support a member that is going through a time of crisis. Such as the member who lost her soldier husband in a motorcycle accident a few years back, another member that lost a child at birth, this group rallied around those members and offered support and compassion.
I've also seen members help each other with information and links to resources, I've seen members help other members in need.
Take it as it is, there is good and bad in all social media.