When I see people potentially making damaging choices I'm not going to be happy, just as WE BOTH aren't happy if we see bullying, or someone being racist or homophobic.
If I see a good person suddenly decide to take up excessive drinking or shooting up with drugs every day I'm going to be disappointed and try to help them. I care about the stranger. You are saying you don't, ok.
You have misread the motive of my original comment.
So we are on the same page in our understanding of judgement, then how pray tell, does someone selling used underwear, affect them negatively or harm them?