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 semanticweb.org: http://semanticweb.org/wiki/semanticweb.org:Fighting_spam ----- Yury Katkov
On Wed, Aug 1, 2012 at 10:28 PM, Anne Wilson annew@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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