BJJ Trend of wearing judo black belts

There’s an emerging trend of BJJ Black Belts wearing Mizuno & Kusakura (yes even the Kodokan Seal ones) judo belts. I’m not referring to the folks that also hold Dan ranks in judo too. They’re not even modifying them with red bars or white bars, just straight black.

I saw it 20 years ago, when it BJJ belts were harder to find. Is it stolen valor to wear the Kodokan seal? It would be a McDojo look for a judoka to wear a BJJ belt without ranking