I mentioned archive.org on my reply in the forum. I've never tried saving something to the archive. Does it handle threaded forum style discussions well? That might be one complication for saving at least some sorts of things.

Yes, this is where some of the moral implications come in, because there is potentially profit motive if I'm selling a game system book, but I link to articles for inspiration appendix N style.

I think once you publish, the cat’s out of the bag. You can take it down on your end but I don’t know id there’s some right to force others to destroy it too. I think the digital world twists this a bit but, in an analog sense, if I clip something out of a magazine article and, some time later, the author retracts it. That had no authority on me if I want to reference it in an article that I write.