What a great word.

http://en.wikipedia.org/wiki/Astroturfing

"Astroturfing is a word in English describing formal political, advertising, or public relations campaigns seeking to create the impression of being spontaneous "grassroots" behavior, hence the reference to the artificial grass, AstroTurf."

I don't see how it benefits the submission though when it's so evident. I personally didn't even follow the link because of these spamlike comments.