Datas like personal information? Yes ofcourse. Who wants here to get copied using that and get scammed? Thats why we have personal information, for personal use. If some sites get this as security purposes then it would be better but not exploited it.
You can get scammed, that's the worst thing that can happen to anyone, to find out in one moment that some scammer wiped your accounts and credit cards. Next thing is bothering, they use our info to bother us with messages, with commercials of all types.
I don't like when my data is exploited just someone to make profit on that. Look what happened with face book, they are criticized for what they did, too bad that they didn't pay in some way for what they did, they should build some building for poor people or to make some playground in some poor neighborhood, face book and many other sites. Because of them we have some new regulations on that field, now internet services promise they will be careful with sensitive personal informations, we will see, but again I think they should pay for the past!