On Apr 23, 2012, at 9:05 AM, Tim Chown wrote:

> On 23 Apr 2012, at 06:48, Tobias Gondrom <tobias.gond...@gondrom.org> 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 that was the purpose, we could sign pseudonymously. Dibs on "Justin Bieber"

> 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.

Shouldn't matter as long as the people who stop signing are evenly distributed. 
Might make security area meetings more cramped.

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