Earlier quoted context omitted.
The spammy links thing fascinates me. I don't know much about search algos or SEO but on our small, industrial business site we couldn't understand why, after many hours and thousands of dollars spent on the procedures that Google recommends, our organic ranking in SERPs for a very niche product (of which we are one of only three providers in our region) was appalling - often page three. It wasn't till we realised we…
I second the other commenter's opinion on disavow-ing links. It did have a positive impact on one of my online properties. Reference: https://support.google.com/webmasters/answer/2648487?hl=en
What I'm wondering is how easy it is really to get to top at some more obscure search term by just using nasty black hat tactics. I'm also wondering if this is actually the easiest way to get top of search results. If that is the case than it's really alarming IMHO.