Well, someone brought to my attention what the manipulator is all about. He is about taking money from many of the bitcoin buyers.
He places these bid walls so that he can sell his own bitcoins in front of his walls to the suckers/fools.
So the manipulator is not trying to raise the overall long term price, he is about short term interests. He could care less the price of bitcoin. he is about stealing money from you suckers. In a way, his tactics will actually make bitcoin price lower in the long run, because he is robbing money from the system. He was probably the main guy who pushed bitcoin to $30.00. He surely has the money to do this, and all he needed was to spend some of it on the way up.
I like him. We will be at $1.00 before you know it. The manipulator will still be around doing his tactics. This is all funny because bitcoin is supposed to be an uncontrolled currency, but it is very well manipulated. In a way, it is being used as a way to make money from the "stupid money out there". All it is is just a way to transfer wealth around, nothing productive is created.
So go on manipulator, put your bid walls up, rob money from the suckers/fools who flamed me when I tried to help/warn them.
While I don't agree on the desire to harm bitcoin overall, I do agree that your theory is one viable option(and I cleaned up your post via removing all your ebay stuff).
The person has so much market power that he can make money via this tactics. He probably has the lowest fees on MtGox and hence can make money with lowest spreads.
The only way to change this is to attract more people to buy bitcoins. Once the "manipulator = big trader" does not have such a big market power any more, its over for him.