Personally, I'm a proponent of Net Neutrality. I didn't sign up with my ISP for VOIP services, or streaming video: I signed up for X Gb per month, delivered to my ADSL modem.
That's it: no mention in my contract as to what the bandwidth was being used for. One month, I may be heavily playing on-line games. Or I may be streaming video for YouTube (or Netflix). Or I may be downloading the new Linux installation for my fileserver (which reminds me I need to do that in fact).
Bandwidth is a commodity same as water and power - these companies don't care how much water/power I use or what I use it for so long as I pay for what I use.
So Telstra... stop bitching and fix your damn network instead of over-selling your capacity and then coming up with tenuous reasons to throttle your customers to stop your network from collapsing.