No convenient method is offered to allow blind people to submit external links to Wikimedia sites.
As per the W3C recommendation:
"An explicitly inaccessible access control mechanism should not be promoted as a
solution, especially when other systems exist that are not only more accessible,
but may be more effective, as well. It is strongly recommended that smaller
sites adopt spam filtering and/or heuristic checks in place of CAPTCHA."
Discussions and other reports about CAPTCHAs that anybody should be aware of before working on this:
* http://lists.wikimedia.org/pipermail/wikitech-l/2008-April/037309.html
* http://lists.wikimedia.org/pipermail/wikitech-l/2013-January/065818.html
* https://bugzilla.wikimedia.org/show_bug.cgi?id=32695
Challenges:
1. Removing captcha all-together proves that it invites too much abuse for our communities
2. External services like Google etc violate our privacy policies
3. Audio captchas present a language barrier problem (next to the language script barrier of normal captchas)
4. Writing our own solution is prohibitively expensive (involves solving an open problem in computer science) and captcha weakness for computers might make the whole thing a wasted effort pretty quickly.
Alternatives:
1. Escalate to some sort of Phone number verification or phone audio message verification (privacy issues and possibly only aggravates the accessibility issue)
2. Add message to make it clearer where to request manual account creation by existing user
3. Make a separate 'request an account' queue for these users, for prioritised account-request processing
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**URL**: http://www.w3.org/TR/2005/NOTE-turingtest-20051123/
**See Also**: https://bugzilla.wikimedia.org/show_bug.cgi?id=47705