This is a classic "creative use of game mechanics" that TK has been ignoring for years. They disappear from 4 to 100 days, depending on what they were banned for. 
This could create a lot of conflicts we have the rights of the King and the Kingdoms to think about, but as well the rights of the banned players... even if the may have incur in an infraction of the rules, they do have some rights to be heard and me be to even recover the avatars.
Each case is different and, although I understand your situation, and it is not an easy one, it is hard to decide how we can act making sure we respect everyone's rights and circumstances.
Any idea on how to achieve that?
This could create a lot of conflicts we have the rights of the King and the Kingdoms to think about, but as well the rights of the banned players... even if the may have incur in an infraction of the rules, they do have some rights to be heard and me be to even recover the avatars.
Each case is different and, although I understand your situation, and it is not an easy one, it is hard to decide how we can act making sure we respect everyone's rights and circumstances.
Any idea on how to achieve that?
Just remove banned people from the game server
Just remove banned people from the game server
That would be for the best, but they won't.
It would be the best way to end multi-accounts, if you use multi-accounts your main account will also be deleted, I like your idea, it is excellent 
Just remove banned people from the game server
It would be the best idea if their programs were perfect at detecting cheating players, but sometimes they seem to catch a lot of innocent players who didn't know what they were doing was against the rules, so it would be a good thing to give them a warning before removing them from the server entirely. I think that repeat offenders who get caught with multies on several servers should have stricter punishments than players who just started playing though. The more prestige you have, the harder the punishment should be.
It would be the best idea if their programs were perfect at detecting cheating players, but sometimes they seem to catch a lot of innocent players who didn't know what they were doing was against the rules, so it would be a good thing to give them a warning before removing them from the server entirely. I think that repeat offenders who get caught with multies on several servers should have stricter punishments than players who just started playing though. The more prestige you have, the harder the punishment should be.
I wasn't aware of people getting banned by programs. I was pretty sure it happens when you send a ticket to support and they check it over.
However, it's still a huge problem to leave a banned player (even innocent ones) in the game because it causes losses to their kingdom. Even if they are innocent and write to support - most likely they won't be able to prove their case because support will say "our program detected cheating" and just leave them hanging. Even if it's a few days, it can be a loss for the whole kingdom. A solution would be to just transfer the player to a random 4-4-4-6 near to where is the place where new players get spawned or something.
I wasn't aware of people getting banned by programs. I was pretty sure it happens when you send a ticket to support and they check it over.
However, it's still a huge problem to leave a banned player (even innocent ones) in the game because it causes losses to their kingdom. Even if they are innocent and write to support - most likely they won't be able to prove their case because support will say "our program detected cheating" and just leave them hanging. Even if it's a few days, it can be a loss for the whole kingdom. A solution would be to just transfer the player to a random 4-4-4-6 near to where is the place where new players get spawned or something.
In reality happens a lot of time that players can justify their position/explain the situation (shared PCs/IP at work, family members, Chrome devs mode on for actual web developers etc.) and people can get back to the game.
Also many banned players get non-permanent punishments like troops/pop reduction, and after few days can return to the game, so if you forcibly move them away, you can damage them pretty heavily, as an example if you can move them away from a crop village. Consider that such a situation could also be "weaponized", by sending fake cheating suspicion reports or constructing fake evidences in order to take over some good village spot.
I think that the only "good" solution is to have admins/MH to manually remove those avatars which are clearly create with the only purpose to multi-account or intentionally block some map spots (low prestige, low pop villages)....
