User blog comment:Mkcstealth/The Ghost of Commander Sheperd!/@comment-3062992-20120728225232/@comment-4950455-20120729012816

Why in the world would this be intentional?

I agree with Diyartifact above that it's not really a major oversight anyway - you're only going to see this if you go looking for it - but if Bioware had planned for an ending like this, do you really think it would be more likely that they'd deliberately have the Invisible Man put your plaque up, instead of having Joker do it?