What is meta? ×  I've read this question, but there isn't an
official (reasoning) answer there.  I do realize that when I
post fast, or when I change IPs I keep getting asked to prove my
humanity, but I want to know why. Doesn't logging in prove it
enough?  share|improve this question If you're posting fast
enough to trigger this often, try to breathe once in a while. If
your IP address is changing frequently enough to cause this
problem, I'd complain to your provider. –  Aaron Bertrand Jul 5
'12 at 19:33 @AaronBertrand: I sometimes get this when traveling
by train; here in Norway you get free internet on the train, but
you IP address changes from time to time as wireless networks
are switched as you journey along. Perfectly valid reason why
your IP address changes. –  Martijn Pieters Jul 5 '12 at 19:48
2 Answers 2  up vote 18 down vote accepted  No, logging in is
not enough. A program can log in (there are plenty of web
scrapers that do just that) - but a program will find it much
harder than a human to sol