It’s a paradox for the modern era: Everyone wants a thriving social media presence, yet no one wants to be perceived. The latter half is for good reason — perhaps you’ve noticed, but the world feels like it’s getting meaner. So MonaVeli’s getting bolder. Earlier this month (October 7) the Brockton artist released the single “PMCO,” an alt-pop hybrid of a hair toss and a middle finger. The caev-produced song (which stands for “poke my chest out”)…