drunkguy, It may be wise not to place a big order away from the spread, but your example is one reason why I suspect the books might like this. If they see all those big orders at -3, then they know something about what will occur if they move it. Fact is, they could fill some at -3 without ever moving the published spread; though this will no doubt offend some players. But I don't see how more information is a negative for the books. There may be other negatives on their side that I have not thought of, aside from costs to implement, but so far I suspect it is a net-positive for the books.
Limit orders work fine in the stock mkt and big players who don't want to reveal anything simply wait for things to move first.
Being a little schmuck myself, I don't mind placing my little order and going back to the day job, living my life, etc. I hate checking lines all bloody day to see if my pick is playable or not.