Side note, it's not as long as you stick in Meta.*
*the Meta posts must be in a thread about your ban. It must be limited to discussion only about your ban, thus you can't participate in any other Meta discussions.
The exact quote:
25. If you get banned (temporary or permanently) and create a new account to continue posting / sending PMs, it's considered ban evasion. The only exception is creating a thread in Meta about your ban.