User blog comment:Damous/Why Bioware has NOT betrayed us/@comment-1388547-20120313014404/@comment-1388547-20120313034229

It's stenciled on some of the structural members around the game -- definitely on some of the ones on the approach to the control panel on the Citadel, but I thought I saw it other places too. I'm guessing it's just a texture that got reused where it wasn't appropriate, especially since it was backward.