Why is filling a captcha code required when creating a new thread? If unregistered users would be bothered by a captcha, I would not give a shit, but why do you have to annoy registered users? It is a pain in the ass, seriously!
It's to prevent spammers from using software to create mass quanity of spammy threads. Also if you fill in the captcha, DP knows that you are a human. If you don't like the captcha then don't create threads. You registered this month and already complaining?
I have been registered on DP for more than a year, I just decided to use another nickname (I hope you will not dislike me for this.) But that is not important. There should be a Javascript (or flash) protection to prevent bots from creating threads - not to force users to write captcha codes - it is annoying! PS: The checkbox with the text about the right category to post is also useless.