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Re: tracking-ISSUE-150: DNT conflicts from multiple user agents [Tracking Definitions and Compliance]

From: Justin Brookman <justin@cdt.org>
Date: Fri, 01 Jun 2012 17:36:27 -0400
Message-ID: <4FC935DB.2060209@cdt.org>
To: "public-tracking@w3.org" <public-tracking@w3.org>
Agree with David --- we don't even know what MSFT's eventual 
implementation is going to be, and I can't say I know what AVG's is 
today.  Is there a screen that's pre-checked?  Is there some sort of 
ephemeral notice saying "by the way, DNT is on."  Will those UIs change 
over time?  Who is going to monitor the UIs and make the decision: "No, 
this isn't user choicey enough!"  How will you know what the UI was when 
the user installed the user agent?  Even if the default is on and 
there's no notice at all, how will the party know that the user didn't 
turn it off at some point, see a retargeted ad for a Vegas casino, and 
then turn in back on again?

I can't see how a standard answers those questions.

Justin Brookman
Director, Consumer Privacy
Center for Democracy&  Technology
1634 I Street NW, Suite 1100
Washington, DC 20006
tel 202.407.8812
fax 202.637.0969

On 6/1/2012 5:28 PM, David Singer wrote:
> On Jun 1, 2012, at 14:22 , Shane Wiley wrote:
>> David,
>> I disagree.  If you know that an UA is non-compliant, it should be 
>> fair to NOT honor the DNT signal from that non-compliant UA and 
>> message this back to the user in the well-known URI or Response 
>> Header.  Further, we can provide information for the user to use a UA 
>> that is DNT compliant if they wish for their preference to be honored 
>> in that regard.
> OK, I think we will have to agree to disagree.  I can't think of any 
> other spec., off hand, that allows one end to 'misbehave' if they 
> believe the other end is misbehaving.  There *are* specs that deal 
> with what you do if you see actual invalid values, incorrect 
> responses, etc., but none that I know of that allow you to conclude 
> 'you didn't really mean that' and do something other than what was 
> signalled.
> I still don't know how you tell the difference between a user who 
> agree with, and wanted, the choice, and a user who wasn't aware of it.
> David Singer
> Multimedia and Software Standards, Apple Inc.
Received on Friday, 1 June 2012 21:36:59 UTC

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