YUUUP this is extremely common actually. (I'm op) before I started my current business I ran a commentary channel that discussed trends and I only had about 35 thousand subscribers. I was stalked and harassed by absolute creeps until I had to leave the platform.
Let me guess he sent you really creepy long detailed messages every day or two about how much you suck and how you're nothing. I bet he also threatened you vaguely in a way that'd make you shit your pants in fear and be scared of him?
