Good afternoon y'all.
I was just looking through some of the older post and came across this. I want to say that they patched this glitch, but in doing so they unpatched the original way of copying emblems. The original way was to have the person who's emblem you wanted to copy in your friends list. Then they have to be on the Multiplayer screen, you would then just keep joining their session and leaving until you get the error message, that is when you are able to go into your emblems and see that you copied their emblem. It takes a long time to do this one, for me it was around 5 -6 mins but I finally copied my sons emblem. Nothing great mind you but I just wanted to see if it actually worked. It does, but like I said it takes a long time and is really annoying. P.S. your friend/son gets really mad since they have to sit there and do nothing while you try this.