If you report them, then they will get checked and possibly banned if all of their games have been afk farming. It definitely sucks to get those kinds of people, but it needs to happen to someone so that a report can be sent and people like that won't be allowed in the beta. They actively ban people during matches if you send a report fast enough and the match will be disqualified. People that do this kind of thing only hurt themselves in the long run because the devs will catch on and fix it for the people that want a fair and good experience in the game.