[atulatul]

Another aspect besides not recognizing everyone from your company is like this- even if someone knows for sure that a person from a different company is helping themselves to snacks, people are may avoid pointing it out. People may prefer to avoid conflicts or make someone else look bad. They are more likely to act if they see someone stealing from their desk, home, etc. That's kind of their domain.

Also, a few other things may also be there- people won't make noise if someone steals snack packets, but they may make noise if someone steals laptops.

Also, if one person steals it may get pointed out more than if a lot of people steal- where stealing is culture, etc.