[Mailman-Users] Automated Subscription Bots Inundating List Owners With Subscription Requests

[Kalbfleisch, Gary]

I personally don't care for CAPTCHA but it exists for a reason.   If anyone can suggest a better solution I would love to here it.  Right now Mailman is being exploited to email bomb individuals and DOS email systems.  This cannot continue.

Gary Kalbfleisch 

Sent from my iPod

On Oct 22, 2012, at 6:08 PM, "Brad Knowles" <brad at shub-internet.org> wrote:

> On Oct 22, 2012, at 5:40 PM, Stephen J. Turnbull <turnbull at sk.tsukuba.ac.jp> wrote:
> 
>> I'm dubious about the net value of CAPTCHAs.  Personally, I generally
>> take a CAPTCHA as a "NO TRESPASSING -- THIS MEANS YOU!" sign, and
>> don't go back.
> 
> CAPTCHAs are already at the point where advanced code can apply statistical methods and solve them faster and better than many humans.
> 
> Moreover, they have been problematic for a long time -- see <http://www.tkachenko.com/blog/archives/000537.html>, <http://ezinearticles.com/?Captchas-Considered-Harmful---Why-Captchas-Are-Bad-And-How-You-Can-Do-Better&id=1104207>, and <http://coding.smashingmagazine.com/2011/03/04/in-search-of-the-perfect-captcha/>, among others.
> 
> 
> IMO, CAPTCHAs have already jumped the shark.
> 
> --
> Brad Knowles <brad at shub-internet.org>
> LinkedIn Profile: <http://tinyurl.com/y8kpxu>