There's no clear answer on that and the search engines will take in other factors.
Example: On the evening before Bush (I think it was) announced his running partner in the last USA election the sign writers were busy putting the decals on the side of the plane. A guy who had been working on his own plane wandered past and saw the first few letters being put on, when he returned security had been stepped up. He went home and blogged about it on his idle, and little read blog. Somehow it got picked up and when he checked the next day his stats were through the roof and he had inbound links galore.
Deserves to be banned for a sudden and dramatic rise in inbound links? No.
And that's the problem the search engines have - recognising (without human intervention) when the links are because of some extraordinary event and when it's because you've been on a spammy link building binge.
You should not, however, be banned. Your links should just be discounted. Otherwise you'd have a great weapon to use against your competitors.
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