They already have AUP/FUP in place. Don't be stupid.
Mweb is the only major ISP that throttles uncapped accounts. The others shape based on their respective criteria. And those shaping policies cause regular folk to experience a degrading experience for the sake of the minority that abuse their accounts. I'm suggesting that it would better to implement harsh throttling, but at a level that will only affect data hogs. For those who are unthrottled, leave them unshaped. Hopefully it would make sense financially with the data hogs removed.