hehe, technical guy here to confuse you even more about how sessions work:

Don't worry about distributing links around with your session junk in it (I do it all the time). vBulletin starts out thinking you are using that session in the link, but the first thing it does is compare your IP browser, and a few other things to the session's stored data. If the data doesn't match, it assigns you a new session.

So don't worry, post all the links you want