ANSWER!

[recommended]The best solution is not to make admins using their steam ids , that means in case the steal steam id they will have no access to nothing [If you have trouble kicking or banning them use ultimate bans system that means you can kick them easy and then with a cmd amx_last that shows disconnected players and amx_addban you can ban them before they rejoin the server ,[others recommondations] also you can update your dproto to latest version or use re-hlds or anti steam id changer that can be found everywhere.