If, instead of clicking on a hyperlink in a page, I copy/paste the link in a new browser window (or tab), I would be nullifying the referring page info for that link [*]. This would a) screw up the referrer stats and b) play havoc with any revenue-sharing mechanism in place that is based on referrer links. This would defeat the designs of websites that pretend to be non-commercial but make money from such revenues. Would an extension similar to Adblock that does this be useful? I wouldn't mind using such an extension if it didn't add too much overhead to my browsing.
[*] Links that have the referrer information embedded in the URL itself would not be amenable to such filtering, though.