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Re: Facebook CAPTCHA verification, when is account verification required (for social media accessibility study)

for

From: Keith (mteye)
Date: Apr 28, 2011 8:54AM

It probably is by a DNS lookup of the IP that is accessing the site. It
makes sense, as most people don't travel widely. Even in accessing the
facebook page by cell phone, most people are within a small area. When the
account is accessed from a signifacant distance, it could be construed that
a malicious attacker is hijacking the account. The verfication process is
definitely a pain, but there is an audio verification as well as the graphic
one. Inconvenient as it may be, my personal take is that it's all in trying
to protect valid users, and guard privacy.

from
Keith H.