Bard vs. Bard

So I just played a game as bard, against another bard. Our team had a karthus. In the last team fight of the game, I ulted across the map to save our karthus. He proceeds to die about 10 seconds later and channels his ult. Their bard ults his team, saving them from the karthus ult. I then get all 4 people on my team saying "gg, report our bard", they thought i ulted their team. I propose that there is different particle effects if it's another teams bard, somewhat like thresh souls. Thresh souls have different colors for different teams. I think friendly bard ults should have a tint or rim of blue, and enemy bards have a tint of red. I understand they want to make it easy to see where and who is ulted, but I think the clarity would be helpful, as I don't want to be reported for something I didn't do...