Suppose there some profiles in the Geni global tree that your don't care to see when you look at your tree (for example, your spouse's ex(es)). It would be nice to be able to ask Geni to filter out certain profiles (and the profiles connected through them) when displaying a tree.
The user's preference should not affect how other people view the tree, only the one user (presumably paying Pro user only) changing the configuration for his/her account.
For example, if Alice had been married to Bob before and subsequently to Charlie, and if Charlie doesn't want to see Bob, then Charlie could ask Geni not to show Bob when showing the tree to Charlie - but that should only affect Charlie's view of the tree and not anyone else. (And likewise Bob might want to filter out Charlie and even might not see Alice in his personal view of the tree.)
Of course the rest of the world should still be able to see the entire tree uncensored and should not even be able to see that Bob and/or Charles chose to configure their personal views to be filtered.