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:
- Removing captcha all-together proves that it invites too much abuse for our communities?
- External services like Google etc violate our privacy policies
- Audio captchas present a language barrier problem (next to the language script barrier of normal captchas)
- 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.
- Disable alltogher and deal with the fallout by improving abusefilters etc..
- Escalate to some sort of Phone number verification or phone audio message verification (privacy issues and possibly only aggravates the accessibility issue)
- Add message to make it clearer where to request manual account creation by existing user
- Make a separate 'request an account' queue for these users, for prioritised account-request processing
See Also: T49705: "Can't see the image? Request an account" should be an optional parameter