Add a feature that allows the player to choose a "stage lock," which will prevent the account from going over certain stage. Can be set to any number (or at least +-1% from MS).
The point of this is to prevent your account from going over a certain stage by accident when you didn't mean to. Such as not paying enough attention and going over a certain stage or splash sources splashing further than you wanted.
The use-case for this is for players wanting to farm prestiges without pushing their MS. So to prevent an accidental MS push. Or if players want to push only a set amount in a tournament, and not more, they can make sure that they will not push more than they want to.

