Not forgetting, simply deferring discussion on that.  We’ve a much smaller limit to deal with right now.  But even that limit would have to go to remove this attack.

From: Btc Drak 
Sent: Monday, June 08, 2015 3:07 PM
To: Raystonn . 
Cc: Peter Todd ; Bitcoin Dev ; Patrick Mccorry (PGR) 
Subject: Re: [Bitcoin-development] New attack identified and potential solution described: Dropped-transaction spam attack against the blocksize limit

On Mon, Jun 8, 2015 at 11:01 PM, Raystonn . <raystonn@hotmail.com> wrote:

  No, with no blocksize limit, a spammer would would flood the network with
  transactions until they ran out of money.

I think you are forgetting even if you remove the blocksize limit, there is still a hard message size limit imposed by the p2p protocol. Block would de-facto be limited to this size.