We have been locked in this cycle for too long. From now on banned means exactly that.
Previously when these and other banned people come back they have been given some leeway on the basis that they were behaving and could be dealt with if they returned to form.
Invariably they do return to form, people get offended, irritated at our allowing it and so on. The process starts all over again unless the cycle is broken by definitive action and clear policy.
So there will be no more allowances regardless of promises or apparent changes in behaviour and when they do come back we'll have to do our best to spot them and do what's required.