You're walking through your neighborhood when you see a group of people trying to force open the back door of a house down the street. You don’t recognize them, and they appear to be using tools to pry the door open. There are no “for sale” signs or moving trucks nearby. You pause—unsure if you should get involved.

While waiting in line at a store, you notice someone slipping items into their backpack. They glance around but don't see you. It’s clear they’re not paying for the items. You’re not sure if anyone else has noticed. What do you do?

You’re walking through a public park when you see someone casually drop a fast food bag onto the ground just a few steps from a trash can. They keep walking as if nothing happened. No one else seems to notice. 

You hesitate—

should you say something, do something, or just move on?