>>68 All volunteers cooperate in you for oneself. They have own life. They cooperate in you within the possible range.
If the resignation is not allowed, you might lose them. They are here for the communications place. They are volunteer to not you but users. Your volunteer is the means for it. So, they want to be avoiding own load.
If you hope for maintenance by volunteers like 2ch, you should consider for volunteers.
I think that I decrease the load by nominating more leaders. You need not prohibit resigning. Even if someone resigns, you only have to adopt it newly. And, This plan will make the time that you adopt any leaders.