How is that Apple's fault? Considering the suspension emails and other info are automated, it's likely that he missed them or they went into his spam somehow.
In this case, there may even be a lawsuit involved so it's not as simple as a customer service rep telling them "you've been banned".
My experience with Apple is that they do what they want and getting anything out of them occurs on their timeline. If you don't like it, get stuffed, they won't budge.
Hoping they reinstate the account feels a bit like a pipe dream given his activity on 5to9mac, and I'm sure Apple was entirely in the right to suspend his account, but he should have been able to discover that in days, r even immediately upon trying to log in (it's not hard to say "this account has been locked because:..." instead of just "this account has been locked") rather than "never being told".