Whether it be your "Contacts" or "Address" book, as long as your computer isn't Zombied or you've haven't given out all the addresses in your Contacts, then SPAMmers can't use a Contacts list that resides only on your computer. In addition, as long as you don't reply to spammers, spammer addresses are NOT placed on your Contacts list.. (You can disable that default setting in Outlook Express.) Don't forward messages with long lists of e-mail addresses attached and ask all those you send your messages to, to do the same.
There's no reason to get rid of your Address Book or your Contacts list.
On the other hand, it doesn't mean folks in your Contact list won't get SPAM. SPAMmers have amazing abilities to send mail to any available address.
Hope this helps.
In 'Spam' thread, an expert has advised to get rid of the 'Address Book'. I am using Outlook 2003. My 'Address Book' is empty. All my addresses are in 'Contacts'. Are they one and same or different? What about addresses in 'Contacts'? Can they also be targeted by the spammers?