Are social media sites creating another avenue that excludes older adults?

While the online participation rates for older adults is increasing rapidly, there exists the potential for new and emerging social media sites to outrun the ability for older adults to understand and apply the proliferating technology. There is no guarantee that the members will include other older adults from the same community, potentially leading to further in-home isolation. Given that research indicates that engagement in learning and social events can enhance successful ageing, how could social media sites be developed to also work towards this goal?