Remember that "Chara" ending of genocide directly called out players that committed atrocities in the name of 100%ing a game.
>I don't care
>it's just a game
>I am doing snowgrave, anyway
Authors whose work is not interpreted in the way that they intended, may be filled with spite, and start producing more work filled with it. Just ask Frank Herbert.
We had Toby actively include "Mike theorists". He isn't a stranger to spite. How spiteful do you think he feels about the lobotomites that started treating "Chara" as their own character? Just how mild will he make Undertale Genocide run look, in comparison to Deltarune Snowgrave?