Courtesy is owed to acquaintances. Doesn't extend to compliments -- more than one way to be polite.

[ No smile that time, though there is still a slightly lilt at one corner of his mouth. Bluntness aside, he sees no insult in just stating fact. She'd advertised her scar to the network herself, after all; it wasn't him that did that. ]

Not that it makes much of a difference one way or the other.