I've seen a couple of friends complain about captchas that they're a pain to fill in. They definitely don't make the signup process any simpler. I've seen some

I've seen a couple of friends complain about captchas that they're a pain to fill in. They definitely don't make the signup process any simpler. I've seen some sites use simple math questions, like "what is 2 plus 5" or something like that. Don't know how effective they are in stopping spam, though.