https://forum.lazarus.freepascal.org/index.php/topic,55641.msg414029might be relevant: somebody's been experimenting with scraping the forum to get an offline copy.
I think the feasibility of scraping an offline copy using wget or similar is touched on somewhere in
https://www.eevblog.com/forum/chat/migrating-the-forum-to-discourse/?all , but it needs considerably more subtlety than simply grabbing what the user sees: to all intents and purposes that sort of manipulation is best left to the forum administrator.
I think a fair summary is that if looking at the source of a forum page shows the text then it can be scraped, although useful metadata might be lost. If the text is only displayed after it's been requested by custom Javascript then forget it.
And in any event, a forum's administrator and users would be justified in being suspicious of anybody who attempted to do this, since a corpus of this type has value to Google et al... not to mention to anybody even less salubrious.
MarkMLl