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Forum Moderators: goodroi
The reason I ask, I am wondering if Yahoo!
1. removes old backlinks from Site Explorer searches.
[ I know they are slow to remove old link data, but do they eventually remove it? ]
2. honors the disallow when backlinks are considered in general.
So far I have not seen a much of impact of disallowing link pages from Yahoo! in terms of rankings to target sites. However it has only been a month since I have disallowed Y!.
I would think I should know in about 5 months, but if anyone is willing to give up their personal past experiences, I will follow up with mine.
You do bring up a good point about disallowing links from Yahoo. Historically they have treated nofollow tags differently than Yahoo. I would expect Yahoo to respect a robots.txt disallow. It just might take some time for them to make the change (especially if you are disallowing a very deep page). Once they make the change will they remove the link data from their database or leave it their since slurp is blocked from confirming the links are removed? Looking forward to figuring this one out.
In all probability (and I'd say certainty) backlinks index is a separate one that gets additions from recent crawls - this means that if you prevent your site from being crawled then the best you can achieve is that no new backlinks (from your sites) will be added.
Yahoo shows nofollow marked links in Site Explorer just fine (Google appears to do the same).