So some of you might be opposed to this, but I'm going to suggest it anyway.
My idea is to have a bumper that you could smash and it would give you the option to disable certain perks.
Obviously you can't disable perks that the player themselves couldn't disable.
When you enter a realm with the bumper set to have no jumpman it would display "No Jumpman" over your head like the life block thing does.
Possible applications for this block could be things like parkours and giveaways so everyone has a fair chance of getting to the prizes first.
Anyway hope y'all agree.