Stopping forum spam - control of the signup process

On all the forums that I look after, I now run code so that everyone who wants to sign up has to pass a Captcha test where he / she is required to retype a word (that excludes automata), and even then there's a requirement for me or another administrator to accept the signup, based on information such as the email address entered and the user name requested (and I get a little more information too!)

Some signups are blindingly obvious that they should be accepted. Others are equally blindingly wrong, and rejected without further ado. And then there are those in between - where there is some elements that make the sign up request a bit suspicious, but other elements that look 100% sensible - and that's where we end up doing further research. Two projects that I have just come across to help my investigations are projecthoneypot and stopforumspam - and certainly they provide good further evidence (and I encourage the projects).

Yet even then, there can be a question mark over some signups. If I'm in doubt (but thinking that there's a strong chance of a signup being genuine), I'll send a friendly email and see what sort of answer I get back - quite openly saying "that's an interest choice of user name - is it your real name", and starting to chat about the person's interest in the subject. I recall doing this with a signup request from Japan for the First Great Western CoffeeShop and getting a very nice email back concerning how upset my correspondent was with public transport from Heathrow to somewhere in Devon when he visited his family there ... "genuine". But there are also numerous occasions where there's no answer ... "gotcha"!
(written 2009-05-04, updated 2009-05-06)

Associated topics are indexed under

G903 - Well House Consultants - Running and moderating forums
  [3479] Practical Extraction and Reporting - using Python and Extreme Programming - (2011-10-14)
  [2820] Netiquette for forum newcomers - (2010-06-20)
  [2781] The 500 pound question to get you started - (2010-05-26)
  [2569] How to run a successful online poll / petition / survey / consultation - (2010-01-10)
  [2527] Flying tonight - (2009-12-05)
  [2526] A reluctance to move from old shoes to new - (2009-12-05)
  [2386] Computing under the influence of alcohol - (2009-08-29)
  [2254] Forum membership - a privilege not a right - (2009-06-22)
  [2177] Preventing forum spam - checks at sign up - (2009-05-12)
  [2162] Admins thoughts on banning a member from a forum - (2009-05-09)
  [2116] Why do we delay new forum members through authorisation? - (2009-04-03)
  [2103] Ask the Tutor - Open Source forum - (2009-03-25)
  [1972] Pettifog and forum boards away from public view - (2009-01-03)
  [1923] Making it all worthwhile - (2008-12-04)
  [1759] While the world sleeps ... - (2008-08-19)
  [1678] Software - changes and delays. But courses must run on time! - (2008-06-15)
  [1595] First Great Western Weekend - (2008-03-30)
  [1578] Please don't shout at me! - (2008-03-16)
  [1569] I dont care - goodbye - (2008-03-09)
  [1563] Guidlines for posting on a forum - (2008-03-04)
  [1539] A forum is not always the best vehicle - (2008-02-14)
  [1532] Comment spam blocked. Please comment via Forums - (2008-02-05)
  [1523] Ive just received an email from myself. Should I be worried? - (2008-01-29)
  [1485] Copyright and theft of images, bandwidth and members. - (2007-12-26)
  [1472] The Horse goes on and on - (2007-12-15)
  [1362] No Thank You - (2007-09-23)
  [1190] Save the Forum - A regular clean sweep - (2007-05-17)
  [1088] Why use BBC code not HTML? - (2007-02-21)
  [948] Running an on line campaign - (2006-11-27)
  [923] Why shouldn't I spam? - (2006-11-13)
  [919] Freedom for X is denial of privacy for Y - (2006-11-09)
  [841] Forum help - a push in the right direction - (2006-08-21)
  [828] Freedom of speech and freedom to post - (2006-08-10)
  [806] Check your user is human. Have him retype a word in a graphic - (2006-07-17)
  [651] Please Register with Opentalk - but just once! - (2006-03-19)
  [516] Open source questions? Anyone can ask. - (2005-12-03)
  [424] How not to run a forum - (2005-08-24)
  [248] Use me, but use me effectively - (2005-03-16)
  [231] Feedback as lifeblood - (2005-02-28)
  [204] The confidence to allow public comments - (2005-02-06)
  [130] Spelling and grammar - (2004-11-25)
  [115] Expiration dates or times on web pages - (2004-11-12)
  [29] Silence is Golden - (2004-08-26)
  [22] Falling out over the silliest things - (2004-08-21)

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