Jmh,
1) The slight to one’s kavod that I alluded to would be with drinking while bent, not bending down on its own. As I said in my very first statement, “it’s undignified to bend over and drink like a horse from a trough.”
2) I know you aren’t expecting to shlug up the Mahari Kra (I believe he is the father of the Rada”k) with your personal kashas, almost all of which I can personally already think of terutzim for.
3) Nowhere in the other mefarshim did I find it mention that the ones “lapping” where bent, hunched, or laying down. On the contrary, it sounded like they say farkert.
4) It matters not if even one mefaresh says like me, and a hundred are to the contrary. You can no longer use that posuk as a raya against what I (think I) heard my rebbi say. That’s besides the comment I made to Sam2 of why it’s not a raya either way.