I had this [question closed](https://stackoverflow.com/questions/3143246/seo-links-from-facebook-delicious-digg-etc-are-useful-for-google-pr-closed). No problem for me, I understood I can not ask SEO questions on SO.

Today I look at SO and see this one: [Can you trick GoogleBot by writing CSS-invisible keywords?](https://stackoverflow.com/questions/2027381/can-you-trick-googlebot-by-writing-css-invisible-keywords).

Is this about programming? Isn't this SEO?

So why has it not been closed too?