=> all of the networks peers must store all transactions ?
=> are each 0.00000001 owner/hash stocked in blocks on all peers?
i don't really understand how bitcoin handle fractions of bc
First,usually there is a transaction fee which higher than 0.000000001 btc.
Second,i don`t know why would anyone give away btc for free.
I think it will be good most of the wallets to add an option to accept or deny incoming transactions.