I don't believe Google intentionally issues false statements, but there is much misinterpretation of statements that are made either in a specific context or purposefully made oblique. The use of "can" "may" "might" raises possibilities of negative reactions, but there aren't "do this and your site is toast" statements.
I've repeatedly seen statements about things that "violates our quality guidelines". Are they laws? Or just guidelines? Telling someone their site doesn't follow quality guidelines sounds quite a bit different to me than saying they are a violator.
One of those quality issues is the flow of Page Rank. Sometimes you don't want Page Rank to flow to your site, so you either delicately use the scalpel or the machete that is the disavow tool. You'll also want to "no follow" links on your site, just don't "no follow" the wrong ones.
Getting back to quality, the following techniques are to be avoided as past of their specific techniques:
1. Automatically generated content
2. Doorway pages
3. Scraped content
Seriously? Virtually every site with regional content is database driven generating doorway pages with regional URLs. Mashing sites are scraping and throwing all kinds of pages up.
I generally don't believe anything Google says or publishes unless those statements can be verified. FUD is dispelled by testing, I always have my own running and pay attention to others like goodroipow.