Without context, it's hard to say if it's a PTB or YDI.
The problem with people moderating multiple communities is, they can do shit like this. Without more context, it kinda sounds like you said something they didn't like, so they banned you from all their comms.
For disclosure and transparency: I started and moderate exactly one comm. I've never banned anyone from it. I'd like to think that I never will. Thing is, this isn't Reddit, and we don't need to be limiting what people can see and do, lest they simply go elsewhere. We don't want them to go elsewhere. I've had people be downright nasty to me in DMs and even in public replies. I'll block them if they persist, but I have yet to ban one from my comm. I run a music comm and I believe music should be for everyone. I don't want to run or moderate a comm where I would want to remove someone's access to it. I might join such a comm, but running one is not something I wish to do.