If people are being human trafficked they’re not doing well.
This idea that all homeless people are fronts for gangs however is a right wing idea that rarely or never plays out. A gang can make money drug dealing, stealing cars, even petty theft, all are going to pay much higher amounts than sitting in the train station begging for change.
Bleach and ammonia makes chloramine which is a poisonous gas, so that’s 3 times you’d be dead.