Questy captcha is awesome but don't forget to change the questions from
time to time. Maybe you'll also find this article interesting, I wrote it
when there was much spam on
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Yury Katkov
On Wed, Aug 1, 2012 at 10:28 PM, Anne Wilson <annew(a)kde.org> wrote:
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On 01/08/12 11:36, Scheid, Bernhard wrote:
Hi,
I am running a couple of relatively small academic Wikis mainly for
educational uses at university. Thus there is relatively little
traffic apart from course time. Nevertheless, some two years ago I
noticed more and more spam and thus reduced editing rights first to
registered users, then to users of a special group that need my
personal acknowledgement. Now, in recent months there is an
increasing number of new users (robots?) obviously attempting to
write spam which they do not do but they are kind of spamming the
lists of registered users. I could reduce the registration rights
but on the other hand I want students to register freely in order
to obtain their editing permissions. Is there a decent way to
detect and prevent harmful would-be spammers from setting up an
account without preventing that option for serious users?
Determined human spammers are hard to beat, but fortunately not great
in numbers. Questy captcha is wonderful at shutting out the bots.
You can expect a massive reduction as soon as you have set your
questions. You just set questions that are simple to answer, often
based on what is on-screen at the time of registration. Bots can't
handle that.
Anne
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