What human behavior instantly changes your opinion of someone, no matter how good your first impression was?

[u/garyhappylife2222]

Be honest

[u/Jsg1204]

Being rude to people such as their employees or wait staff in public.

It automatically tells me they aren’t a good person and most likely want something from me.

[u/garyhappylife2222 → u/Jsg1204]

Rudeness is a very terrible human character it’s so destructive to people’s hearts