her status and authority, unfortunately, make her an acceptable target
Agreed, but It's really more that she's a complete arsehole. As a nimby mining magnate, she is a sponsor of organised climate denialism and vocal about it herself, a race she clearly has a horse in. She's also an active libertarian who wants to further dismantle the welfare system, and reduce taxation, and wants Australian workers to be cool like Africans and work for $2 a day. And a vocal Trump supporter.
It's not the painting that makes her ugly, it's her behaviour and ideology.
On the trams in Melbourne, the doors have little stop signs on them to remind cars that alighting passengers have right of way. It makes sense as the passengers don't have visibility of the cars, but the cars can see the tram stopping, and the doors opening.
Also, the tram can't wait for traffic to stop before letting passengers out, then continuing on its route. They have to keep schedule, else the whole network suffers.