Originally Posted by changoo
I mean it's so obvious, why are they so dumb.
I have pondered this too a lot, but I assume that as already stated it is purely for ability to have a story. Think about it TR actually nearly succeed every time before they are caught. That's what builds up the majority of several episodes throughout the original generations.
Although they really could have made the disguises more convincing in that case. Why not fool the audience too?