Some people believe that their code will become automatically GPL licensed if they touch GPL software. I don't know how Syke meant it, but Microsoft and others have been running a FUD campaign about "viral" GPL relicensing your code for many years now.
Originally Posted by GreatEmerald
If you violate the GPL, you have violated the GPL, that's it. Your code does not become GPL automatically. Even many OSS advocates sadly get this wrong.
Perhaps Syke meant it differently, but it's important to fight the "viral" FUD.