The company I am at, the HR people look at social media for potential employees. I know the manager has looked at my internet use. He said I do not look at videos. I do not think they know what I am posting as no comment has been made.
My co-workers are always looking on their cellphones or work pc’s at either movies or video games.
Make sure you are using https://freerepublic.com and not http://freerepublic.com. They both work, and both look the same except that HTTPS should have a little padlock in the URL box at the top of the browser and HTTP should say "not secure". With HTTP they can see what you post, and they also can see your password.