Similar to arguments about getting human support from Google being impossible... There is a very simple solution: allow users to pay a modest amount, say €25, to get 10 minutes of real human support. This will immediately rule out people spamming at scale. The other side of this equation, is that if the ban is upheld, they must justify it in human terms, beyond : "the ML said it's bad". A positive judgement could then then be used to train the ML to be more lenient on this user going forward, at least when it's a borderline case