Netscape 3.x - uh?

I just thought i would check over my stats and see where everyone is coming from (I think its the voyeur in us that likes checking these). Anyway there some interesting finds.

4% dont support the .png graphic format. Which is annoying because personally i find it to be 100% better than .gif
2% dont support style sheets.

But the odd one out is:
2% Netscape 3.x. Hello, please tell me this isnt true. Im putting this down to kids with nothing better to do than change there user_agent, or more likely, bots? Surely no one is still out there using this.