Enforcement asleep at the wheel or corrupted. http://www.themarketguardian.com/2010/07/market-manipulation-on-display/
Maybe someone should inform the "market expert" that the CFTC regulates the futures markets, not the SEC. Who cares if someone flashes 2000 or 4000 contracts? You just ignore it. Zero evidence that the flashes moved the price. If you just look at T&S or a chart you don't even see the DOM flashes. The Globex has cancellation rules (ratio of actual trades to cancelled orders) and it is up to them to enforce their rules.
This is an example of people taking advantage of bots which are designed to jump in front of your order, you should be happy that a guy is willing to post 4000 contracts on the ES to fuck these bots, cause it will eliminate the assholes jumping in front of your order solely based on size.
You need to read the Globex rules for ES. It is pure FIFO, size doesn't count for placement in the queue.
Where has this guy been, under a rock? This has been going on for many many many years. Whoever can place the 4000 lot order is at risk of getting hit and has the money to back it up (or should anyway). Ignore it. He is just trying to influence a program.