Dust can also be an issue. It's definitely a cause of concern for pistachios, where cracking the shells releases enough pistachio dust to cause skin rash to my allergic daughter, even though she's never touched a pistachio in her life. Cracking shelled peanuts can likely cause the same issue, I'd wager.
Although peanuts served in planes are not in the shell, I can imagine how having potentially allergic people in close contact to people potentially oblivious to allergy issues eating peanuts sitting right next to them and eating peanuts could be problematic.
Although peanuts served in planes are not in the shell, I can imagine how having potentially allergic people in close contact to people potentially oblivious to allergy issues eating peanuts sitting right next to them and eating peanuts could be problematic.