- From: Karl Dubost <karld@opera.com>
- Date: Fri, 28 Oct 2011 14:52:07 -0400
- To: Justin Brookman <justin@cdt.org>
- Cc: public-tracking@w3.org
Le 26 oct. 2011 à 10:43, Justin Brookman a écrit : > If a user today sets her browser to "block third party cookies," a third party cannot evade that control by putting in a license agreement "you consent to our placing third party cookies despite any browser settings." The case is simple here. The user just blocks at the client level the possibility for the Web site to save something on his hard drive. There is no issue at all. The same thing can happen with "blocking URI/content APIs". It gives control to users. > Similarly, if a user sets her browser to "Do Not Track" (or whatever her browser calls the setting), Acme shouldn't be able to ignore that instruction by reserving the right to ignore that instruction in a place the user is unlikely to notice. Acme is able to ignore anything. It just means that they are not compliant. But as long as the user is sending which is identifiable, the other party may use it. It is exactly for the same reason that robots.txt are not useful to block search engines, spam robots, etc. Some like Google respects robots.txt but nothing technically forces them to do so. As an example, my own site is publicly accessible, but I block [1] the indexing by search engines. I have also an atom feed. Some readers were using Google Reader for reading the content of my Web site. My surprise was that my content was indexed in Google search engine. Google reader was feeding the search engine through their back-end without checking robots.txt. My only way to block it was a mechanism on my side in Apache configuration file to block any requests from Google Reader (identified with the user agent string.) Since Google fixed the issue after the help of Ian Fette. That said is that you can give mechanisms to achieve things but as soon as you share information on the wire there is no technical way to avoid it will not be used inappropriately. [1]: http://www.la-grange.net/robots.txt -- Karl Dubost - http://dev.opera.com/ Developer Relations & Tools, Opera Software
Received on Friday, 28 October 2011 18:52:55 UTC