because Ripple is centralized, and it's closed source.
Will you stop, when Ripple is open-sourced, and more independent servers show up?
Considering they have handed out 100 BILLION ripples as free gifts to developers and investors that they are free to dump on N00bs heads at any point.. hell no. It was, is and will always be a scam to convert worthless 'service currency' to BTC.