I suppose it's a long shot, but you could ask the site admin. I am assuming that they're using forum software that stores messages in a database, and deleted messages probably get purged regularly in order to keep the DB at a manageable size. But if they still have backups they might be able to help you, though the amount of work involved might not be worth it to them.
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould
