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I certainly would never do this, but I am wondering if there have been cases of it happening, etc...
It doesn't change a lot; there are so many Internet Point.
I am curios about the question too:
> the person just start submitting your site to the SE over and over >
Which SE penalize repetitive submissions? Do they have something like filter that automatically check the suggested URL in their DB?
Does this influence submissions to human managed directories like ODP and Yahoo?
Maybe, is this the only good gain about PFP?
Bascially, I leave the competition alone unless it is scrambled doorway stuff that is 100% se spam (which is few and far between). Everything else is just good seo.
Here's an article that everyone needs to read and illustrates just how unlikely it is that anyone would ever be tracked down by their IP address: