Apparently making the RG final is "his downfall". No doubt about it he probably should have played better against Nadal but Nadal was playing lights-out. Even the best version of Djoker I suspect would have maybe pushed it to 4.
As long as it doesn't prevent the opponent from playing their game in a disturbing way, I couldn't care less. Now, could players do it less? Probably. But at the same time, it's exciting to see people pumped up.