Why exactly does another man who chooses to use a HP rifle to rid the land of pests in a humane fashion embarrass you?
Would you be happy if he used a smaller caliber and increased his chances of wounding the animal? Or would you prefer that he ate the disease ridden, scrawny, tough, worthless, overpopulated, grassland destroying invasive species that he's shooting?
I really don't think that long range varmint shooting is what I consider hunting either, more like simple pest control... but that's just that - "what I consider" - it's an opinion. That said, I really doubt that jacks are all that they shoot or hunt. Do you think the same people would blast deer or other noble game to pieces w/ a .50 bmg or 20mm, just to leave it lay? I don't.