Much of football is mental.
If the D linemen are worried about certain blocks than the Broncos have already gotten in their head.
I think they'll just play ball and let the chips fall where they may. Players get hurt all the time by just making a misstep.
Like I said in a thread yesterday it's not the player's fault if the block is legal. He has been given an "ok" if you will by the league to block that way. And somebody else posted that some other teams do the same type blocking sometimes.
If it is "cheap" it's approved by the league. So there you go.