From long experience I now never use a real email address on Usenet. This is one of the biggest sources of email addresses for the spammers. There are people who sell thousands of email addresses on CDs etc and I know for a fact they harvest Usenet addresses. For a bit of a laugh one day a colleague knocked up a unix script to see how many addresses he could get. It was too easy, the script took 10 minutes to write and after a hour or so he had over 100k addresses... Oh, and it was a trivial matter in the script to take out common spambusters like "yourpants" and "NOSPAM" ...
Also if you use a work address the company's spam filter may block much of the spam created but the employer may well take exception.