wOw this is like bullet prof..... what a spam prof..... anyway I think this is the most effective spam prof...
I kinda like the captcha that ask you to spell a word backwards I think that is hard for bots and is easy for human beings. Well at least easier than the derivative maths.
actually those are easy with TI-91 or above calculators or math programs you can type in whole equation in and BAM! you have answer easier than asking spell this or find same shapes, etc.. but intial investment of software or calculator by spammers're neccessary haha
Ugh, blogger's captcha DOES suck. Good article, there were some pretty bad ones on there... the math one... I could never solve.. I'd just refresh on that one and hope for the ole' 1+1
Imagine how clean the internet would be if there were captchas for everything and they were ALL like that!
I hate Captchas - sometimes it's enough to make me just leave - some of them are sooo annoying, you just know you are typing in the right letters and it keeps telling you you aren't human - drives me crazy!!
ohhh i love the rapid share cats and dogs! so cute its from http://random.irb.hr/signup.php i reload the page but any is easy! lol probably is a nerds-only site
Microsoft also have some very hard to read captchas... or undernet.org ... lol I think that at this question , the A = 0 , but i am not very sure.. http://farm3.static.flickr.com/2174/2268237733_cda4a1dbb3.jpg?v=0 i mean take a look x=0 , right? so there is a/0 = 0 and then that fraction * that { } will always equal zero ... but i know that divization by zero it's not allowed in math ... lol anyway if you write zero , then it will just work "