reversing up a one way street

Looking at the parking in Fremantle Square, it's been clear that either cars drive the wrong way down a one way street to park, or they reverse up it, even though that doesn't make sense.

Without seeing any vehicles parking, there was no way to be sure. But as of last week. Evidence. Cars are reversing up one way streets -in the legally allowed direction- to park.

We even have it on video.

Two only remaining questions. First: why? The sole advantage to reversing up is that it is easier to drive off the wrong way afterwards. Secondly, given we now have proof that cars actually do this, what can we say about parked cars seen parked the wrong way in a one-way street?
(car: N754NOJ. Location: whiteladies road).