In view of the recent malleability issue in Bitcoin protocol, I was wondering if it would help to have a feature to approve/disapprove incoming transactions.
For example if someone sends you 'mystery' 1 satoshi which you don't want. You can disapprove the transfer and it goes back to the original address.
Why it should go back, it should be dropped from the blockchain, but that would be not be easy as it is block-chain