Logging in is not the issue that Royse777 is talking about. That is using reCaptcha, for which there is already a workaround but this one that OP is referring to specifically is when you try to open any page on the forum, but you can't because you see a Cloudflare screen that never goes away, even if you complete the captcha 10 different times.

The Cloudflare blocks are IP-based. Doesn't stop them from banning all tor exit nodes though.