If you know in your guts that you are misbehaving, or failing to behave rightly, then you will be anxious to hide your guilt about your viciousness – your moral, ergo ontological weakness, ergo political weakness, ergo vulnerability – from your fellows. So you’ll want ways to signal that you are a virtuous person, that do not much interfere with your pursuit of your favored vice. Facebook posts promoting politically correct notions, participating in bootless group activities like marches and charity events, donating money, shopping at the right sort of stores, and the like: all are good for this purpose. They don’t require you to change anything about the way you live. They don’t require moral behavior. And so they are cheap, relatively speaking. Much cheaper than repentance.
But if your vices are valuable to you – which they must be, or you wouldn’t find them alluring in the first place (indeed, you’d find them boring, stupid, or ugly), and they wouldn’t be yours – then you will feel it important to express your interest in them publicly, too. You will want to reassure those others who value the same vices, and whom you therefore think are themselves somehow valuable, that you are in fellowship with them. You will want them to accept you as their fellow.
So you will find ways to signal your vice. You will seek ostensions of your basic, willful transgression of social norms of righteousness: tattoos, odd costumes, weird hairdos, unkemptness, strange activities, and the like. All are good. They signal your sympathy with vice, and with the vicious.