Wow I have just played a game against someone in arena. He emoted every single round. I intentionally did not squelch him, because I was curious about what does he want to accomplish. I never use emotes or very rarely "Well played" to normal players. But he literally abused the emote button every time he could click on it. I am just wondering if these kind of people are actually autistic (I do not want to be disrespectful to them in any way) but this is a serious question. You must be brain-damaged to do such things.
I added him after the game and asked him (in a polite way) that I would just like to know why he is abusing emote button and he started to talk about how he is a businessman and a pro player (rank 10). After that, I have just spoiled Avengers End game for him and removed him from friend list.