Yes...when I was a stupid teen (a long time ago) I used to pride myself at staring down perceived ops and never breaking eye contact -
except for two people.
One Puerto Rican cat named Papo and another dude who was half black/half hispanic. Both had demon eyes and my gut told me told just keep it pushing.
Later down the road, the Black-Spanish kid ended up stabbing some dude in the stomach (he was phukin dude's girl and dude confronted him at his building vestibule - made the news in brooklyn)
Papo ended up killing some dude during a drug heist gone bad (he went to a stash house and killed someone while trying to rob it).
These dudes always struck me as the type to cross that line and then when I found out that they actually did, I was glad I never sought smoke with them.