|Completely Automatic Public Turing Test to Tell Computers and Humans Apart
||25 Sep 04
As the latest trend by spammers seems to be to spam wikis, one can setup
the same sort of "enter the number in the image" process as
network solutions, ebay, etc, do. CAPTCHA below is one possible solution.
A simple CAPTCHA ("Completely Automatic Public Turing Test to Tell
Computers and Humans Apart") written in Ruby. This will dynamically
create an image containing a key displayed on a noisy background, which the
user must enter into a text box. link
Alternatively, as Ari has pointed out in ruby-talk:
Alter the engine so that external URLs go to a non-indexed-by-
search-engines "leaving the site" page. It effectively kills any
pagerank that adding a link would add to the linkee. That's both good
and bad, but it's a short-term solution.
It may be that a simple HTTP redirect script would work, too, but I'm