NFC is used in a lot of transit systems around the world ... Visa/MasterdCard already have NFC deployed in a lot of country. If the data is properly encrypted then the risks are acceptable.
Absolutely.
A friend sent me an email regarding "blink" credit/debit cards and how they are easily hacked.
In the "exposé" on Dateline, a man walked around with an blink reader he purchased for ~$100 online hidden in a small zipped case. He approached people and waved his case near pockets/wallets/purses, getting their account information which he then used to code onto hotel key cards.
A few things wrong with this "study":
1. He literally had to almost touch people with his zipped up device, then wait for it to "beep".
2. This only worked on wallets, and again, he had to get extremely close to people and wait for it to be read
3. Using a hotel key card to make transactions with the information he acquired made me laugh; when and if I used my cards to "blink" a purchase I am always asked by the teller to see my card. Waving a hotel key card to purchase something would be impossible, and the tellers already knew what he was doing ahead of time.
4. The man sells metal card holders and other paraphernalia online, a nice endorsement to his "study"
5. Credit card companies have security points and also work with individuals should such theft occur
and finally
6. You may always ask for a non-"blink" card
Now "blink" isn't the same as NFC, as NFC is encrypted or at least better encryption. As well, Japan, China and E.U. have been using NFC in mobile devices for years. If it was so insecure, I highly doubt it would be the preferred method of payment by millions.