Can leaving game actually be punishable?

Grettings.. So can leaving game on PBE server actually result some kind of punishment.Last game we were losing in beggining and 3 people just left game saying "Im done with this shi*."And this happens almost every game, at least one people is afk.Expecially now when new players are here, they think its ok to leave because "it's PBE, it doesnt matter".People can't test anything because games are 15 minutes long and everyone gets tilted. Thanks for attention
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