No, we're trying to tell people it may have malware. You're the one telling everyone you're 100% certain, because you're so wonderfully amazing, that it doesn't.

And what could malware do? Well it could install a key logger and record you logging into sites. It could phone a premium rate number at 4am every morning for 10 minutes. It could be a spam bot. There are a number of things it could do. And it's perfectly reasonable that people be cautious.