[Post Game] Chats showing as names not listed in the game

So, this has happened several times now, where a name being used in the post-game chat is not the same as the one listed in the stats above. The first one was where the player used the name "You" in post-game chat. This one, the player's name is "Ducfan", but there is no player named that on either team. I am starting to think that there either is a major bug (where the names are wrong on the server-side) or the chat server is not validating the usernames being used to post, allowing people to post using whatever name they want.
Report as:
Offensive Spam Harassment Incorrect Board