They cannot handle 11.6MB unconfirmed transactions then how will they handle 20 MB blocks with 200 MB uncorfirmed transactions ?
It would be dramatically more expensive to spam the network with 200 MB of transactions.
It will be more expensive with 1 MB block. The bigger block the cheaper spam.
no,look at the current spam attacks.
they are small tx's with the minimum fee. if that spam wants to actually get included in the next block or 2, it has to increase the amount of fees it pays which would cause the attack budget to skyrocket.