No, it's not about using Netscape. We know that most people use IE. And new personal computers are usually shipped with Office XP, wchich supports Smart Tags. Smart tags do nothing more then stealing your traffic.
Good that it's rather easy to protect yourself. You have to insert the following meta tag into the head of your html files:
<meta name="MSSmartTagsPreventParsing" content="TRUE">
And this prevent Smart Tags from appearing on your pages
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