Nobody comes here by error or misstyping on Google. Most of the non-caring people would just look at the frontpage and leave. Those who go through the register process (Cialis spammers aside) obviously ARE interested or more than just curious about Bitcoin (and sane curiosity can be relieved with an anonymous reading of the forum).

So, WHO is interested on Bitcoin or its technology being successful or being doomed? Specifically, who would be aggressive against BTC naturally, so much that they would dedicate clear efforts on going against it?

Easy. Those who DON'T want YOU to be part of it... to have it for THEMSELVES or NOBODY ELSE