Were the other threads about this not good enough?

People place large orders visibly and are accused of rigging the market, people place them invisibly and are accused of rigging the market. The market is what people are willing to pay, that's it. Letting people control what information they reveal is perfectly reasonable. Anyone anywhere any time can make trades without you even knowing about them. There is no good reason for MtGox to give up customers who want that. And even if he stops it, it doesn't help you. They just do it elsewhere or set up an automated service to add to their bid as needed.