Members are "screened" for being an owner. Now how many have sold and moved on - that's not known, but even if they sell, as part of the family they are welcome to stay. Seems like half the sellers come back with another one later anyways.

As far as "drama".. well I've found the block option works real well for people you no longer desire anything to do with.. But this is not about "for or against" face book. Just wanted to through out a social interaction option for those who might enjoy it.