What should I do about links coming in that are from link farm type sites?

[RobertFisher]

I just noticed two back links to a couple of sites around pharmaceuticals/attorneys. The one link is to a chinese site with url: http://e.lifestyle.com.cn/fashionweekly/nzj/353093_2.shtml, and the other is to a site called Adroo: http://adroo.com/us/?view=list&list_id=104154&lang=en.

Both appear to be some type of link farm sites, one has come in as a nofollow (surprise, you can buy "ads" on their site, both have decent DA. There is no reason for them to link to theses sites, should I find a way to stop the link?

Also, on one of the sites we had a dmoz link and it is not showing in OSE? Link is still open in dmoz though. Thanks for any input.

[RyanKent]

I agree with John's assessment of the links to your site. There is nothing you can do about them and Google does not penalize you for any unpaid links that you have acquired.

Also, on one of the sites we had a dmoz link and it is not showing in OSE?

Linkscape only captures the top 25% of pages on the internet. The question is, how buried in the dmoz directory is that link? If you go to dmoz.org, how many clicks does it take you to land on the page with the link? What is the PA of that page? If the page is too deep or has too low of a PA then Linkscape wont see it, and Google may not either.

[john4math]

Google won't penalize you for their links to your site.  You have no control over who links to you, and there's little you could do to get them removed.  I see new links for my sites come up all the time, and some are from these spammy sites.  I've never seen a penalty accessed.

If they did penalize sites for this, people would set up even more link farm sites just to link to their competitors.