53 base kills by multi account preshooting in 2 days.
Its just wrong. Thats a number which a good player that hits a lot of bases gets after a whole month.
It does not matter if its allowed in the ToS. It is something that is killing this game and for a good reason. The ToS are not carved in stone. I can't imagine you like this gameplay and I can't imagine that you would tolerate it if it was easy to fix.
Talking in IT terms... you are the PO (product owner), we (the players) are the business. And this is a very important business requirement. Delaying a solution to this problem this long already cost a lot. Many of the old players quit because of the bad state of this game.
Some of us rallied together some of the old guys that already quit some months ago. And many wanted to come back for the players they played with on former worlds. The community is the core that keeps the players playing this game. If those alliances fall apart because too many core members decide to quit, then there will be even more that quit.
If somebody like CIC_Bloody shows up on Speed World 2 and does something like this there as well, then I will quit that world and eventually the rest of our team will quit as well.
I offered my help earlier already. It takes some efford to fix this problem, but it is doable. A concept that many other games are using are game moderators. Form rules for stuff that you can't ban by design and let a moderator team manage reports about violations. Rules like "check if IPs are similar and if yes, check if there is an account that profited from those multi accounts". 1st. violation: 1 day ban. 2nd violation 3 days ban. 3rd violation 1 week ban, 4th violation permanent ban. The only efford would be to develop tools that allow moderators to gather the information necessary to check the reported accounts.
From a talk with bloody I even know that they only use it because it is allowed. His words were: "If they forbid multi accounting, then we will stop it."
Its not like there are hundrets of players that say multi accounting is a core element of this game and they can't imagine to play this game without it.