While you are correct about it not being in the rules (or i had just missed it), i feel like it would be common sense that ban evasion is against the rules given that the whole point of a ban is to prevent the player from joining the server as a punishment for breaking the rules, hence evading a ban would be like evading the fact that you broke the rules.
I would also like to mention that ban evasion is subtly mentioned in the rules as a bad thing