I bet there are labels like this all over Avengers tower
Okay, but now I am imagining Steve figuring out how to use a printer just so he can put labels all over the tower:
Outside the air ducts: “No Climbing Inside. I’m looking at you, Barton.”
Inside the air ducts. “Clint, I’m very disappointed in you.”
By the coffee machine: “Coffee isn’t a food group, Stark. Eat a sandwich.”