That is no longer a question that can’t be answered.
With the Facebook timeline rolling out it becomes real easy to peer back into the past and remember (or try to forget) activities from your past. In some cases a little bit of culling might be in order. There is just so much information that has been dropped into this black hole.
Early users of the timeline have reported that they are surprised when they look back at the timeline and immediately start on a pruning process. One can hide items from the timeline, delete them permanently or highlight certain events or photos.
Facebook is trying to become the single source or aggregator of you life stream. It will be our choice if they will be given the keys.