I work at an agency, and we have done things for Sony in the past. Even small campaign sites like this get caught in "legal review" for a week or two at the minimum.
That being said, I would imagine that someone in the agency that did this thought that "open source" means "free", and that the lawyers at Sony weren't informed where the icons came from (or didn't ask).
Ultimately, I do think KDE should fire a takedown notice and make a big stink about it, though. Sony certainly wouldn't be shy or understanding about it, so neither should they.
That being said, I would imagine that someone in the agency that did this thought that "open source" means "free", and that the lawyers at Sony weren't informed where the icons came from (or didn't ask).
Ultimately, I do think KDE should fire a takedown notice and make a big stink about it, though. Sony certainly wouldn't be shy or understanding about it, so neither should they.