I'm so sorry you're experiencing this issue. However, it's difficult for anyone to help with a technical issue -- and we do want to help you! -- without having some basic information about what it is exactly you are trying to do, and then the technical error or exact problem you're experiencing.

What type of computer are you using? What browser? What error message are you receiving when you choose "File > Print"?

The forums aren't doing anything that blocks you from printing a page (just tested it on Firefox and Chrome and works fine). Maybe if I knew what specific thread you're referencing as well, I could help you further.