I've received a number of requests recently for link exchanges from people who have link partner directories hosted on the LinksManger site.

I noticed that all of these sites had no Google cached versions. I just checked the LinksManager robots file and all of the link folders are disallowed.

http://www.linksmanager.com/robots.txt

I think they've got an agressive marketing campaign going on. But to stoop to this level is beyond belief.