Honest question. Did the author even attempted to contact Sony or anyone in the KDE organization to resolve this issue?
While it might be good style, contacting a copyright violator before making things public is not at all a must. Sony is not exactly known for communicating well, so it might not have been worth the effort.
Not that I have a problem with this method, but it isn't usually done with the end goal of fixing the problem.
Big corporations must learn that they can't treat their users badly but disrespect the laws themselves without getting into PR trouble.
Violating the GPL terms matters legally.