Black Hat SEO

So I am always on the look out to see what websites are using less then favorable SEO tactics, A co-worker and SEO expert showed me this sneaky SEO Black hat use from a website in the Netherlands and they also have a international website. What these guys are doing is using a hidden H1 tag with a bunch of keywords reducing the size to a crazy low pixel level, they also have a scrolling box filled with a huge amount of these which they are trying to pass off as a banner I think. I mean this is not crazy black hat but it is not good! Check out the image below -

black hat seo

Any one else have examples of Black hat SEO you have seen please post them below!