I'm lowkey curious where this happened - there's a pretty well known dickbag in Hampden who rides around with his toddler on the back of his bike and deliberately puts himself and his kid in harm's way to antagonize drivers. He's unhinged and well known in the neighborhood. Stuff like crossing at speed in front of a car when the driver is proceeding on a green light, then following the car while screaming at the driver. All with a toddler on the back. What you described could just be regular city-living lapse-in-judgment, but yeah, watch out for this dude.