Compare it to a dangerous sport like rock climbing. If you don't take neccessary precautions and prepare, rock climbing can be very dangeroues. As can poker be if you don't know what you're doing. The BIG difference is that if you take precautions, rock climbing is still quite dangeroues while poker becomes pretty harmless. Banning something that is merely a hobby for most people because because it's harmfull for a few is wrong. Should we ban motorsports because a few have died participating in it?