Exclude a referer

From a report, not altogether

[webmuppet]

We got Farked and I'd like to be able to see stats for the week excluding the Fark domain. The only way I can see to exclude is using filters but that appears to ignore for new traffic, not for previous. Is there an easy way, I'm assuming I'm missing something simple.

[justa]

Check out [viget.com ] and scroll down to "Advanced Segments for Historical Data"

[webmuppet]

Perfect, thanks.