Guys, let's talk about ReCaptchas, where you click certain pictures to clear the captcha. Sometimes you don't have to click any picture, and I'm fine with that. But here comes the irritating part of these captchas, I finally see verify button after clicking like 50 cars and I say "Thank God", But NOO!! I get welcomed with a message "Please try again", and then click 50 street signs again. 
Sure it is annoying for you. As far as i know recaptcha is a way to prevent from spam and from engaging in abusive activities so i think they did this security(recaptcha) for the btctalk website for those who wanted to abuse things.