It's been going on for years and is only classed as a Level 2 offence as far as the ICC are concerned. This is on a par with things like

Showing serious dissent at an umpire's decision by word or action.
Breach of the Logo Policy relating to a commercial logo or a player's cricket bat logo.
Public criticism of a match related incident or match official.
Inappropriate and deliberate physical contact between players during play.
Aggressively charging towards an umpire while appealing.
Deliberate distraction or obstruction on the field.
Throwing the cricket ball at a player, umpire or official in a dangerous manner.
Using language or a gesture that is obscene, offensive or of a seriously insulting nature to another player, umpire, referee, team official or spectator.
Any attempt to manipulate a match in regard to the result (In a negative way), net run rate, bonus points or otherwise. (Example: Intentionally losing so that a team will face a weaker opponent in the Finals.)

The scale of penalties for this are as follows:- Level 2: Fine of 50% to 100% of match fee and/or ban for 1 Test or 2 ODIs.

The ICC have issued punishment relevant to their Code of Conduct, the rest is down to the Austrain Cricket Board if any other punishment is to be made.