Well, if this is allowed in chess.com tournaments, it is not fair to the players remaining after the intentional forfeits.
This forfeiting is against the rules. The forfeiters when detected, should be disqualified immediately.
That is the rules of chess and i dont see why chess.com should disagree with this in the name of recreation.
Personally I don't understand how these players get away with forfeiting games, or resigning with no moves played to a namesake, then staying to play other games in a tournament.