Its against Google's rules? But that's only if its a concerted co-ordinated effort isn't it? A community reaction to the ads would surely not invoke that sort of label would it?

It would also be unlikely to be sustained for any length of time.

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"All truth passes through three stages. First, it is ridiculed, second it is violently opposed, and third, it is accepted as self-evident." Arthur Schopenhauer - renowned 19th Century German philosopher.