martinibuster - 6:27 pm on Sep 13, 2013 (gmt 0)
That "sometimes" applies to links you know nothing about and which Google is already discounting as part of it's regular algorithmic discounting of crap links.
If you're not aware of the specifics, remember that we're essentially ignoring those links...
What kinds of links would a web publisher not be aware of? Scraper links come to mind.
That Googler also goes on to say:
If you're aware of specifics around those links, then I'd recommend resolving them...
What kind of crap links would a web publisher be aware of? Those are the ones that should be acted on.