Oh I have no illusions that it would stop the useless photos completely. I'd be happy if it cut it even a little bit. and if it "standardizes" those things a bit, why not? I see the same ones repeated endlessly anyway.
"No American family has a coat of arms." I am descended from the Goodrich family in England. I can trace my line back that far as can most of the other Goodrich's in America because almost all of us are descended from the same two brothers. I can even point you to the ancestral castle as it still exists today. The coat of arms for that branch of the family comes up in my searches all the time. Also the German flag because I have ancestors who immigrated from Germany.
And considering their recent push into social media (Facebook import?) they might even like it as it would add another social aspect to the site. Hey Ancestry...read up on some game theory to see how this might encourage people to use the site...and upgrade their subscriptions to "earn" those illusive immigrant badges. :P