Maybe they are an acting out of anger to an anonymous world………that answers.
It may be an evolution of an expression that needs to be vented, thrown out in a way that doesn’t hurt anyone because it’s anonymous, safe.
It’s like another feature of the world of technology we live….and it’s actually a positive effort to rid yourself of negative feelings. Like hitting a wall when it gets like that only virtually.
It’s never good to have to act out those feelings but this is probably the most efficient in today’s world where so many of us feel isolated.