From: Dave Thomas <dave@...>
Date: 2004-09-28T21:37:04+09:00
Subject: Re: RubyGarden Spam


On Sep 28, 2004, at 5:59, Austin Ziegler wrote:

> On Tue, 28 Sep 2004 13:39:59 +0900, David Ross <drossruby@yahoo.com> 
> wrote:
>> You should create a way to generate images with text
>> verification. This would eliminate spam.
>
> Captchas can generally be defeated by programs and violate usability
> standards in any case unless there's a fallback -- which would likely
> be able to be used by spammers to continue their process.

How about displaying a trivial line of Ruby code and asking the user to 
enter the value. Something like

    To stop spammers, please enter the value of the following

       1.+(2) = |   |

Change the + to a - or * randomly, and pick random numbers between 1 
and 9


Cheers

Dave