[stcredzero]

I think the trick is to leave a path open for a person to discover that their personal social Venn diagrams are this complex. There should be several stages. At each stage, a user discovers some pain (I wish I could leave my parents out of this) and then discovers an easy solution. (Ah ha! I can use this "parent" tag and then it prompts me so I can choose to not let my parents see this.) The user is pleased, until they discover their next pain. (I don't always want all of my friends to know about...) The end result is that you've solved the user's pain several times over, and so they love your product.