You can ask, but don't insist on it. Some families are connected on social media and it works for them. Some teens don't want their parents seeing everything on their pages (and will block you from seeing things, which kind of defeats the purpose of being friends). Following your teens online opens up a can of worms, and you'll have to figure out how to negotiate that new relationship.
There are a great many people who would love to own a home still hesitating and staying on the sidelines. Some don't have the down payment, or they may have credit problems. However, credit is loosening up; down payment requirements are coming down as well. Many are more able to buy than they think.
Grandparents have the sweetest gig. They just get to spoil their grandchildren, right? Well, grandparents in the 21st century also have a completely different perspective on grandchildren than those of previous generations. Many think that kids are losing their ability to communicate with and respect their elders.