It's both Google trying to force web sites to help their algorithm and spammy sites trying to exploit the current algorithm that are causing these annoyances.

It's both Google trying to force web sites to help their algorithm and spammy sites trying to exploit the current algorithm that are causing these annoyances. I suspect neither would be a major issue if Google modernized their algorithm to take into account (mostly/only) which links people actually clicked on rather than what is linked from where. They'd only have to be able to distinguish people from click-bots, which might be easier to do with some confidence than recognizing the intent behind a particular link (spam/SEO or real information for visitors) - I hope they are already able to do this, for the sake of AdWords customers ...