I mean, if someone is going to commit a crime, forcing them to leave a paper trail is going to scare at least some of them off. And if I'm installing Adobe Photoshop, and the cert comes from Bob's Software Emporium, Delaware, it raises questions.
In Windows, the name of the publisher in the cert shows up on the UAC prompt whenever the program asks for elevated privileges. That's the point of this whole thread -- the author isn't paying for a cert because he can't make the UAC prompt say Notepad++ instead of his real name (which, he could, and I have no idea why he thinks it's so complicated, but there it is).