I don't consider deleting my Facebook because real life contacts use it and use it to organize / communicate. But I also don't use it as a social platform, so there's really not much to delete although I suppose there's tracking data. If I really cared I could probably figure out how to avoid most of that too.
One idea I've had and haven't really figured out yet is to try to use Facebook to bring more people onto the Steem platform. I would basically be putting my own experience on there and see if that appeals to anyone I know. In the real life contacts world, many people are curious about it, but oftentimes they don't have the time or energy to try it. Just needs the right amount of motivation I suppose.