No. Because the 21 century wiseguy know that would be an idiotic and counterproductive choice, with the FBI and other government agencies competing to find the shooter, generating unwanted attention and probable flipping or big cases against the hierarchy.
Look at the Bulger case. He was killed by a 2 lifers that was only an associates and had nothing to lose.
Even the wannabes know that to kill a famous rat wont give them respect but only problems.