The Age Old Question

[200xth]

My concerns with feeding in the home enclosure:
1)I want to grow Kaa to be the type of snake I can handle regularly (within reason) and I've heard feeding this way causes them to confuse handling with feeding and creates snapping responses for them
2)I use substrate and have heard that feeding f/t to them while on substrate can pose a risk of them swallowing it, leading to impaction or rupture of the bowels.

Both of those are non-issues.

If the first was true (which it's not) and feeding your snake in his enclosure teaches him to be snappy, what's the inevitable outcome of teaching him that being picked up leads to food?

Ball Pythons have been ingesting bits of wood, dirt, mud, and small rocks for tens of millions of years before humans ever existed. Your snake is well designed to deal with a little bedding.