lucy24 - 7:25 pm on Nov 21, 2012 (gmt 0)
Directories and search-results pages. The ones g### begs you to exclude from its searches because their own algorithm isn't clever enough to weed them out. Sites where you click More, and More, and More, and eventually there's a link to something on your site. Or there was, at the time g### crawled the page. Oh, and the occasional hotlink.
Collectively: Garbage Links.
But at least they've figured out that piwik isn't a link. Whew.