> have to implement the simple user.delete.all.data() That may not be as simple as you think. FB probably has thousands of data types and each one needs to def

> have to implement the simple user.delete.all.data() That may not be as simple as you think. FB probably has thousands of data types and each one needs to define how a deletion should affect everything else. E.g. if I delete my comment, what happens to your reply? That one is obviously solved already since it's a core part of the product, but there are probably lots of pieces of data that were never designed to be deleted so will need effort to support.