What's the most /fa/ way to walk with a backpack? Hands in the pockets? Hands swaying freely? Hands holding the backpack straps?
OP is an autistic fuck but everyone is shitting on him even though most people here dress to keep up appearances. Either to look presentable/professional/trustworthy/friendly/approachable/whatever or, for the edgy teenagers, to make a statement.
The idea behind it is the same, you care about how people perceive you way too much.