On 23 January 2013 09:45, Rich Kulawiec <r...@gsp.org> wrote: > On Mon, Jan 21, 2013 at 02:23:53AM -0600, Jimmy Hess wrote: >> that sort of abuse is likely need to be protected against >> via a captcha challenge as well, > > Once again: captchas have zero security value. They either defend > (a) resources worth attacking or (b) resources not worth attacking. If it's > (a) then they can and will be defeated as soon as someone chooses to > trouble themselves to do so. If it's (b) then they're not worth the > effort to deploy. See, for example:
CAPTCHAS are a "defense in depth" that reduce the number of spam incidents to a number manageable by humans. Not all bot writers have the same quality. A lot of them are crappy. Because of this, maybe are worth the effort. -- -- ℱin del ℳensaje.