das Uber Soldat has hit the nail on the head. One look at the level of tatts and the social media posts of the people involved, and these give a good indication of the level of social skills of the offenders.
The problem is, if you offer low bus fares to bogan destinations, you're going to get a large number of bottom feeders filling the seats.
Then you need to upgrade the level of pax control to the same level as bogan nightclubs. Perhaps a simple breath test for suspect pax might ensure cabin calm in future?
6 fighting drunks cause JQ diversion