Bowlers get in trouble when they follow through down the wicket into the danger zone and scuff the wicket.

David Warner is batting so far out of the crease in the 2nd innings of the 2nd Ashes test and must be close to the same danger zone.

Can batters get in trouble for scuffing the wicket by batting so far out of the crease?

The protected area is not all about the bowlers. If the umpires consider that the striker/s are deliberately moving into the protected area taking guard etc. they can apply the warning process and ultimately impose penalty runs if they persist. You can’t have batters potentially damaging the pitch and thereby give their bowlers a later advantage.

Just building on the good answer from Tim here.

This Law regarding batters going into the protected area of the pitch was changed / added to in 2017. It was felt there was not enough guidance and empowerment given to umpires previously to take action against batters who took their stance too far outside of the crease and caused damage to the protected area in playing shots.

Now, either umpire can stop the batter from going into the protected area if they take their stance so far down the pitch that playing a shot sees them continually in the same area the bowlers are not allowed.

The law makers continually review the balance between bat and ball and fair and unfair play. This change brings more equality back to how both bowlers and batters are treated regarding damaging the pitch.