I have not been engaging any black hat technique to improve ranking from the starting in seo field but I have encountered various of the same. We all know that these are bad and adverse on our site as well as ranking. However, I appreciate those who use it as Google can't find such techniques and ranking those sites higher in top 10 rather punishing. I would like to share one of them. Site Name: Autogeek.net They have placed the below mentioned content under this image "Autogeek.net & At Autogeek, We are car care! Autogeek has the best car wax, car care products, and auto detailing supplies to give your vehicle the perfect show winning shine. Auto Detailing Clay Bar, Porter Cable 7424 and more." However, they are ranking higher in Google. See, http://www.google.co.in/search?hl=e...for+car+detailing&aq=f&aqi=&aql=&oq=&gs_rfai= Could you consent with usage of black hat techniques in SEO?
It looks like they have changed the site because the example that you give is not found on the page, or in source code. If they just used it as "alt=" text, it is not at all black hat. If they hid it behind the image it is IMO borderline, and certainly dishonest. Do these 'tricks' work? Yes, but not for long. Eventually people get caught and the site gets penalized.
The example you given are not existing but their title is seems a spam anyway. Even saying that it cannot be considered as black hat tactic applied.