If you are going to try and be a tricky SEO, PLEASE at least be good at what you do. If you are going to hide text, and try to trick Google, make sure you either pass the bots, or you pass human review (preferably both). Also if your going to try and be a tricky SEO, don’t do it in a vertical with competitive SEO’s.
I recently noticed a new website ranking in one of my search verticals. This website was one that appeared all of a sudden 3rd in rank, which any site that appears all of a sudden is usually suspect (especially low page rank). When I looked into it, I realized that the site was in fact a sub-site built to gather regional traffic in our area. A bit more digging reveled the screen shot above.
Check out note C (sorry I noted them backwards). See how there is a link with a font size of 1? That makes the content of the <font> tag disappear. This was a GREAT way to hide text in 1996. Sadly a decade later some SEO companies are still trying to hide text. Why is this bad? Well because all that someone has to do is report them for hiding links, and a manual review by Google will get them penalized.
Also check out the amazing link text. (a) is full of rich keyword for the link, yet only the name of the website (b) is in the anchor text. My point? Why would someone hire an SEO company that doesn’t even know how to SEO for themselves. On top of that, why go through all the trouble hiding links to your dummy sites and ignoring the opportunity to build up traffic to your main site?
*sigh*

3 comments so far.
is roughly equivalent to a block. Assuming the pages background is white, the color=#ffffff is what’s really hiding this on the page
Hello!
Very Interesting post! Thank you for such interesting resource!
PS: Sorry for my bad english, I’v just started to learn this language
See you!
Your, Raiul Baztepo
Hi !!!!
My name is Piter Kokoniz. oOnly want to tell, that your blog is really cool
And want to ask you: is this blog your hobby?
Sorry for my bad english:)
Tnx!
Your Piter