No replies on the holding the door and smiling being the sign of a swindler? That actually sounds like you live in an exceptionally hostile place. I’m swedish, as in people not exactly known for showing a lot of warmth to each other in public, and I always hold the door, and smile at people very often. The smiling part might be somewhat unusual here in Sweden too, but not unusual as in bad or a sign of a swindler. Most people seem to appreciate these behaviors. Either that or I’m absolutely delusional and everyone secretly views me as a swindler ¯\_(ツ)_/¯