I think the solution here is simply not using knock-off sites...
Agreed, however there is lots of content on that site that should be kept for future evidence. - It would be great if somebody did a dump of the entire forum.
Just got on the link and saw that's the alternative forum created a while ago... I thought it was one of those websites mirroring this forum. That being said my last post doesn't make that much sense and I wonder why they're blocking archival of their pages... It would be a nice question to ask, if someone has an account there. I think the only resort is maybe using another archival site, Internet Wayback Machine or storing the pages locally.