On 5/1/06, Brion Vibber <brion(a)pobox.com> wrote:
1) Mirrors running MediaWiki on a database dump
already get rel="nofollow" by
default unless they explicitly switched it off.
2) Screen-scrapers would be getting rel="nofollow" in their copies too --
something they currently DO NOT GET, thus multiplying the effect of linkspam.
I did a quick sample of some mirrors. 2 out of 10 used nofollow. 5 out
of 10, however, used some method of link obfuscation (such as using a
even link stripping. So it appears that at least some mirrors are
actively trying to _prevent_ links to external sites from being
indexed, probably as some method of SEO.