Ha - I had a situation that we were being linked to from (name removed) large cruise company. It seems that we had a least several fans from their company that enjoyed our podcasts and a recent review they got, and made our podcast page the homepage of the terminals on board! Ha!
I do agree that the count of sites that you reference IS getting way out of hand, especially those that are linked to that are not in engilsh, which means that is finding out "what its being listed as/to" is essentially impossible. I don't have a fix there, but I look forward to someone chiming in on it.