I just really don't see why people need to limit it like that at all. Unless the icons look wildly out of place because they're dated to the era they were from, why should it matter? It is limiting in my opinion, but I'm of the mind that when I find the right face, that's the face and back-ups/other options are usually very difficult for me. So I'm really glad I have never come across this issue before. It would turn me off a bit, because I just don't understand why the rule has to be made like that in the first place, you know? It just never occurred to me that someone would mean it that way instead of just age of PB at the time of the pictures is within the range of the character being played, end of story.