Just to let people in here know, since some comments really think this is how people act, this is an exaggerated view of things. This manga is taking everything that can go wrong with people to the max, trying to take this and use it as fact is, to put it plainly, wrong.
Trying to take any of the teachings this manga has and putting them straight into the real worl without trying to filter them is worrying. And you're more likely gonna end up looking awkward af.