batterdwhitehat - Since you say "black hat spam", I'm assuming you're talking about "churn and burn" techniques, which are generally short-lived, and which involve illegal activities, like hacking sites. Most of the complaints I've seen about really bad Google results are about this kind of spam.
Keyword stuffing and hidden text doesn't rank you on anything very competitive these days, though black hat spammers will often include such techniques in the package just to throw others off the scent.
A good overview of what's going on with blackhat spam can be found in this thread...
Understanding hacked sites that rank in Google Apr 4, 2013 http://www.webmasterworld.com/google/4561487.htm [webmasterworld.com]
Do read the Matt Cutts blog post about hacked sites that I link to in that discussion.
Hackers target Google in preference to the other engines because Google has got a lot of traffic. Chances are
extremely good that Google is aware of this.
The "normal" Google algorithm which ranks sites competitively, though, is not built to deal with churn and burn spam techniques. So, when you see such results, it's generally not a weakness in the Google ranking algorithm. The spam team deals with these special cases, but, as discussed in the thread I note above, the process of dealing with a hacker is not necessarily immediate.
Google has recently been adjusting its algo to identify and deal with spammy areas more quickly, which might allow it also to ease off its emphasis on brand authority, and that's discussed most recently here....
Google Launching Payday Loan Algorithm 3.0 Targeting Spammy Queries June, 2014 http://www.webmasterworld.com/google/4679408.htm [webmasterworld.com]
If you think that Google is unaware of the spam you're seeing, you can report it directly to them. The
Google SEO Forum Charter [webmasterworld.com] suggests the best ways to do this.
