I recently posted the following on Metafilter, only to find it "disappeared" in 1984 style.
I find the idea of "meme patrol" to be the key here... imagine if you can watch for people who might have an insight that helps in opposing your cause, and then deliberately derail them (while building a big database of such people).
You could quickly know what to look for, who to try to discourage, etc., you'd be able to wisely leverage resources in a manner far better than astroturfing, etc.
Imagine if you had a technology that was top secret, and wanted to delay it's eventual re-discovery by the masses... this would be the way to do it. Find people who are starting to figure it out, and target them in a subtle but persistent manner.
... now I have to wait for the meta-troll to come after me. ;-)