On 23 Apr 2012, at 06:48, Tobias Gondrom <tobias.gondrom@xxxxxxxxxxx> wrote: > On 23/04/12 13:41, Joel jaeggli wrote:. >> >> What property of the blue sheet makes it personal data. > > The fact that publishing them will allow to track in which location (i.e. meeting room) you are/were at a given point in time. Basically a person could track your movement over the time of the IETF week. I thought one main purpose of blue sheets was to size the rooms appropriately. If people stop signing the sheets due to privacy concerns, and I would expect many to do so if this change is made, we might be seeing a few cramped rooms. Tim