To begin with, it refer to subordinate system in various games.
Just like how Beast Tamer have skill for Animal EXP +20%, or leader unit with skill Marine Unit ATK +100 like that. As I said there, if you have problem with that, why not raise the complaint to game devs. that having such system, promoting violence, crime, racist through tribe-locked skills, capturing extinct rare animal, etc. this works just taking note from that.
Funny that Naofumi get all this glaring thought while other isekai protagonist, example Ainz, can just kill thousand people mercilessly and nothing wrong with that.
Regarding thanks from villager, I think they tried to summarized it with chemist jii-san and the magic shop clerk. We already got the villagers totally supporting him in anime compare to source where some of them still get doubt due to Naofumi keeping distance attitude.
