I'm not sure what else you can expect from Mark, if you make posts like these on a fan account.
I'm all for letting them know they're screwing up, and Mark is a pussy for holding a grudge, but at the same time you have a successful fan account they are aware of, so I'd take these snarky remarks somewhere else, or at least in the comments of your post for discussion's sake because when you decide to say something on a public platform, then you have to be aware that it may reach them.