I was trying to edit my own reply and I had to fill this captcha: What do the programmers say to the "world" ? I type all these: hello, Hello, hello world, Hello World, Hello world. None of them worked. Also when tring to make a new post the captcha's text is not fully visible (it could be because I have large fonts set). Also there was another question to make a PHP variable which did not accept $a = 1 .
I can understand the enthusiasm to have programming related captchas but the implementation is frustrating for users (at least for me).