[hellsfury_25m]

Just as a footnote to the posts listed here, I'd like to add:

Unless you are trying to trace someone who has bad intentions toward you, or you yourself have bad intentions, there is no need to know someones IP address.

I'd also like to add, for the benefit of those reading this thread with bad intentions. No matter how well you try to mask/spoof your IP when on the Internet you can be traced and prosecuted.