Here is a site that displays all the header files that your browser sends: http://www.ericgiguere.com/tools/http-h ... iewer.html Judging by the number of them, (and the differences that different browsers make, IE7 spits out a whole bunch of new ones like processor type and via), I wouldn't be surprised if neopets just flagged every account that logged in with missing/incorrect headers.
Yeah im pretty sure this in wrong section, but yeah they prob do. Thats why you clear you cookies and chnage useragents when switching accounts
The user agent should always match the browser you are using, some of the ABers here use the useragent header of browsers a few years old. Also, I am positive that none forge some of IE7's extra junk. Changing the useragent when you switch accounts is silly, millions of people use the same useragent, and it would be much more suspicious if your account was accessed by 2 different versions of firefox for the past month.