Dragons head coach Kingsley Jones was left perplexed after watching the yellow card issued to lock Rynard Landman against Cardiff Blues.
Landman was sent to the sin-bin for clearing out Alex Cuthbert at a ruck, with the Wales international wing subsequently falling to the floor.
That came following Cardiff Blues centre Rey Lee-Lo's yellow card for a high tackle, both decisions being somewhat contentious on Monday.
Referee Ben Whitehouse adjudged Landman to have made contact with Cuthbert's head with a shoulder while not wrapping his arms around him during the clean-out. But Jones was in no doubt how he feels rugby union is going as officials look to stamp out foul play in the game.
"I couldn't play the game today, looking at that," he told Wales Online.
"We all want to see the game clean, we understand why. But I just don't get that decision. I couldn't see any contact with the head.
"I don't know where the game is going if you are going to go down that route. You can look at any ruck in the game. That's the way rucks are run, there's two big powerful guys bumping into each other."
He added: "I think it's a crowd pleaser. Alex falls over and fair play to the Blues fans they did a great job. They chanted and it's come back to that.
"Alex has fallen over, but it's just nonsense. I don't really want to get drawn on it, but it's a poor decision for me.
"It's going to be difficult for everybody, players and coaches, if that's the way it's going."