That can also hurt! If you are posting in irrelevant to your blog/site theme forum categories, you can spoil your linking profile and weaken site relevancy.

Just to avoid any misunderstandings, since it is a damn bloody common practice our days.

__________________
"Being an expert isn't telling other people what you know. It's understanding what questions to ask, and flexibly applying your knowledge to the specific situation at hand. Being an expert means providing sensible, highly contextual direction." Jeff Atwood
SEO Workers - Search Engine Optimization Consulting Company | SEO Analysis Tool | Webnauts Net SEO