Essentially the online business model makes it easier for some smart person to hack your details 'en mass'. Usually all it takes is one disgruntled employee and there goes your secure info.. and money. And ever since the computer has been in business.. there are plenty of these people around.
DVD's are here for a long time to come no doubt, as it's still the more secure way of buying a game/software.
Actually this give me a really great idea..
As the saying goes... "a fool and his money are soon parted"