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The backward links are from the same sitemap page but have different url endings like domaindotcom/default.asp?ws=39&action=link2 They almost look like tracking urls of some sort. There are tens of these all pointing to the same sitemap page.
To make matters worse (for me), the sitemap page has five or more sets of keyword linking to each city and state.
I don't think these urls are used for anything but to inflate his links. It seems to be working.
What should I make of this?
Wouldn't this be risky or should I play tit for tat?
As for doing the same, best to do it right and then you have no worried, just get the links to increase the rankings form other sites.
But if you want to do the same you need to make sure that you can get all these pages indexed and that can be the trick.