Better to say something, because that skipped step could cause a real mess for everyone. You're looking out for the whole team, not just picking on one person.

Wait, that's not quite the same thing though. Sampling uses the actual recorded sound, the exact notes. Borrowing a layout is more like taking the chord progression or song structure from a tune and writing new melodies over it. The line gets blurry when you copy the unique, recognizable "hook" of a design, not just the basic grid. If the soul of the original work is still there, even in a new context, that's when it feels cheap.

I feel for anyone running on empty at work.

Tell them to test it by walking past, like @thea_anderson said.