I think we had a chat about this at some point. Your neighbour's usage may affect the network, but your real time service is always preserved. In some instances, like today, we have to fight a little harder to preserve latencies than normal, but in general you always have full realtime service. To my knowledge no other ISP offers this distinction - I could be wrong though. This is the norm with US ISPs and in the EU, according to the experts we consulted when we designed our system.
Leave these dudes and dudettes alone. If they'd researched where Afrihost's priorities were then wouldn't have signed up in the first place.
I chose Afrihost because I wanted constant real time performance and I am getting it. Maybe they should go to an ISP that prioritises HTTP downloads... Think Cybersmart is the only ISP which considers HTTP as real time.
Other than that all the ISP's have load based shaping policies apart from Web Africa with their start rating. Furthermore, Axxess, Cybersmart, OpenWeb as well as Afrihost priorities real time services like streaming etc.
So YouTube and the singing cat prevails almost all the time.