You customize your own "Block Tag", which would be a KV6 file you would edit, but you couldn't change the models, a bit like reskins.
You would then upload this via your Ace Launcher.
To collect "Block Tags", you would have to kill someone with a spade, or maybe kill them and then go to their corpse to pick up the "Block Tag"?
This is based on Battlefield 3, but I just think it would be epic in AoS, maybe there could even be some assassination animation if you kill someone from behind with the spade?
Or you could just simply kill someone to get their "Block Tag"
This is what I think a Block Tag would look like, you could reskin it but not change the model.

Download the KV6 file HERE
-Discuss :D