You can use the hidden for the guest. The best example - Suppose your link is hidden. And the member can see the hidden text that will count the links by spider. One more thing you can not use the same text as background that will come in blackhat. This is one of famous and old black hat technique to fool search engine .More Read about here-blackhat techniques
Avoid Black Hat SEO techniques. some of my friend use backhat method and they still get enough money... so, what must we do with blackhat method? or, we must use whitehat method?
To keep your website safe from Google's penguins you need to implement a lot of techniques and you need to avoid many things that you used to do! Penguin can kill your business and to stop him from doing so you need to consider quality over quantity, at least that's what I read here in a article that highlight all google penguin information.
I'm not too worried, it will all change again in a year. I try to build websites for humans not for search enginees.
Forum profile links are as good as useless. So its best you avoid them. They are not working right now.
The main target of Google new update in its Algorithm to kick out black hat SEO and spammer. Here in this update only those getting rank who had really done a good and fair job for their sites. If you are going to hire SEO service provider then its a very good time for it. Because most of the spammer kicked out from first page. And now you get those SEO service provider who are doing good work.
Excellent thread. My view is that no one should be using phishing related scams anyway. I think it's always important to focus on content, content content!!!
Google Penguin is not about keeping the hidden text out of your website it is about the back links and the On Page measurements like Meta tags, Keyword Density and others. If your website has so many back links coming from a single website then you might become a victim of Google Penguin update. Keep a limited numbers of back links for your website and use generic titles when building a link for your website. It's better if you use 3 tail keyword because it looks like a title rather than a keyword.