The article goes on to say how you aren't in any legal danger by installing Safari on your PC. It's obviously a mistake from Apple. The EULA for a Windows product says that you can't install it on a non-Apple machine. That is just not possible. Jonathan Kramer, a lawyer for the Kramer Telecom Law Firm, says "You can't enforce a term that's impossible."
Safari 3.1 For Windows Violates Its Own EULA, Vulnerable To Hacks
"The new Safari 3.1 for Windows has been hit with two 'highly critical'(as rated by Secunia) vulnerabilities that can result in execution of arbitrary code. The first is due to an improper handling of the buffer for long filenames of files being downloaded, and the second can result in successful spoofing of websites and phishing. This comes close on the heels of criticism of Apple for offering Safari as a update for approximately 500 million users of iTunes on Windows by default, and reports of crashes. There are currently no patches or workarounds available except the advice to stay clear of 'untrusted' sites."
Further, Wormfan writes
"The latest version of Safari for Windows makes a mockery of end user licensing agreements by only allowing the installation of Safari for Windows on Apple labeled hardware, thereby excluding most Windows PCs."