How is it not your real phone number? I currently have no cell service on a device. It only uses WiFi. I have a VoIP app on it. People use it, it rings my phone, I answer it.

People's definition of "real" is so arbitrary in a way that suits them, but it's no less correct than the answer I provide.

Statistical models that say "most accounts we don't ban have these characteristics; most accounts we ban have other characteristics; your account is in the second group so BAN!"

Which is just positively-reinforcing tripe making it harder to do anything remotely outside the "norm" even if your intent is 100% non hostile.