GaryInOz (Vic) replied:

Stabilising bars only help going around corners, they help to prevent excessive body roll ("Range Rover" syndrome) by tying one wheels suspension to the opposite wheel through a torsion bar spring (the sway bar/stabiliser bar/anti-roll bar, whatever you want to call it). Removing them will not affect the load carrying capacity of the vehicle, but it would be very wise to slow down a bit more than you would have been used to going around corners when fully laiden, as the higher center of gravity and the lack of the stabiliser bar will induce a rollover earlier.

The advantage of having them disconnected is that it allows more wheel articulation off road at the expense of lower stability on road.