This idea has its pros and cons, let me explain.
Obviously in certain chats they practically force you to have a rank without having to ask for it (generally in promotet chats in Spanish).
I understand the idea of rejecting these ranks but in these chats the bots are configured in a certain way so that would make that power obsolete unless the bot servers change their configuration.
Let's put the point where the chat is in a members-only setting, will you reject the rank? I think not.
Also, as Stif said, the ranklock can be adapted for that function without the need to get a new power.
I like the idea that it can be adapted to ranklock, as this would also create conflicts between users if the power is released for that function only.