forum.dlang.org is now using DCaptcha

[Jacob Carlborg via Digitalmars-d-announce]

On 2014-12-02 22:41, Vladimir Panteleev wrote:
> I'm sure you all are as tired of the occasional spam that hits these
> lists as I was deleting it. (Mailing list users in particular, I guess,
> since we can't delete an email once it was sent out.) Most of the spam
> was coming in through the forum, so I suppose I was responsible for
> [not] keeping it out.
>
> Although forum.dlang.org has had a spam check and used reCAPTCHA since
> it was announced, it is only somewhat effective against fully-automated
> bots - it is powerless against humans paid to post spamverts on forums
> web-wide, which is what the current spam economy seems to be gravitating
> towards.
>
> Enter DCaptcha, a question-answer challenge tailored for D programmers.
> Its goals are to challenge posters of suspicious-looking content with
> questions that should be easy to answer to D programmers, and impossible
> for non-technical people with no incentive to learn or research stuff
> (i.e. spammers). DCaptcha is already in use on the D wiki
> (wiki.dlang.org), with great success - DCaptcha's debut cut the
> short-lived explosion in wiki spam to zero.
>
> For an idea of what sort of questions DCaptcha asks, you can demo it on
> the following page, so you don't have to clutter the forum with test posts:
>
> http://wiki.dlang.org/extensions/DCaptcha/demo.php

The "anonymous class" feature question, I was a bit stunned at first, 
before I saw what it actually was.

-- 
/Jacob Carlborg