I go lots of forums and ask private questions. I am worried that other people at work can trace what I have been writing. How can I stop anyone knowing what I have been writing?
Don't use the same forum name and unless they are moderators of every forum, they won't know who you are anyway. And hopefully you are doing this while at home and not at work?
I truly want to know what you ask. Even if you use the same name everywhere (I do that a lot), private questions or statements should be made through private message.
