Some idiot wicked webmaster, of an Italian website with warped ideas of SEO decided it would be a good idea to have a hidden reference to my personal website url, written white on white, on one of their numerous pages (52 of them) whose only purpose is to list hundreds or thousands of websites in order to make their site come up in searches for any one of those other websites. All those pages of course come up as total blank pages, as all the text is white on white. They are not links, they are text references, including the http part. Vey wicked.
They finally removed the reference to my site from there. But their tactics continue, they still have all those seemingly blank pages with hundreds of sites listed white on white.
I bet Google would love to see the underhanded ways they use. The stupidity of it all!