That's a solution yes, but users may need a specific page for a specific reason. Due to the fact of being xat wiki, all the pages should be allowed to use in BBcode without asking permission.
(i already know your thinking )
When i changed my internet provider, it started giving me captcha every move i made. Then i figured out that my IP was on blacklist, i asked for my ISP change my IP and then it stopped giving me captcha.