Thanks for the review! What exactly is nerdpoling (is it what I know as "pillaring"?), and what would you suggest to "stop it"? I wrote this as a means of (among other things) slowing down pillaring, since fast pillaring typically requires you to place blocks colliding with you. A block placement quota might additionally be useful to slow down pillaring. An alternative option to consider is something like structural integrity checking, where pillars past a certain height would degrade to piles (blocks would fall left and right).
Nerdpoling is pillaring. There's a MC mod called No Poles that breaks pillars past a certain height. That's one approach, but I'm more looking to disable building under your feet entirely, as the dangers of spelunking is almost destroyed by simple keeping a stack of leaves in inventory in order to not get stuck.
In the case of this mod I suppose it would need to disable one extra node above the one that gets disabled currently, which would at least work in default gravity and jump strength.