Hi Shaun, it's probably best to check with Parks Victoria (tel. 13 19 63) on the current status of Mackenzie Falls for swimming and your risk of prosecution. Ironically, there is a picture on the Parks Victoria website of someone sitting in the water at the base of the falls, which looks as equally inviting as my pics. When I was there mid last year, there was still some flood damage which made access to the base of the falls difficult - this will need to have been fixed to access the pool safely. Workers were on the site at the time, but it looked like a big job. If you end up going, it would be great if you could let me know via my website what the current conditions are.