On Wed, 24 Nov 2004, Bob Jamison wrote:
Maybe instead of text, do what some e-shopping
sites do. Have a pass phrase displayed on an image,
and let the person type that in. Then the pass cannot
I think the text-based verifier should be sufficient: the important thing
is that it should no longer be possible to spam our wiki using
*off-the-shelf* automated tools.
I realize that tools can be customized, but we can always change the form
of the verifier again if countermeasures to it becomes widespread, and I
think most spammers wouldn't see it as worth the effort initially, just
for one wiki.
Additionally, to be effective, an image-based CAPTCHA would need to be
heavily distorted (many spamming tools have OCR), which is really cruel to
folks with less-than-perfect eyesight, or those who are not using
graphical browsers for whatever reason.
I probably fall into both categories somewhat; I wear glasses and have
problems with eyestrain, and it's also not unusual for me to do quick wiki
bits from lynx or w3m rather than hauling out Mozilla. If we adopted an
image-based CAPTCHA I would probably stop posting.