They could be. After all, Gackt left HIS band.
Plus I heard he (Gackt) didn't go to Kami's funeral. That's bound to piss people off, like, say, Mana.
I've seen that thing before as well. Hell, I'm the one that gave it to Nightwalker.
"I've been used" -Gackt
"Get used to it" -hyde
We say that SO much...Although surprise, surprise, she's (Nightwalker that is) isn't Gackt...