Your SG going full farm mode is very personal though, and not any fault of the AE systems. Farming to get a lot of X thing is just apart of the MMO experience. There isn't a single MMO in which you don't repeatedly do something to get the item or money you desire. Especially when it came to X enemy killed for Y badge. Power leveling can create 'noobs' but so can just being bad at the game. What really hurt CoH [farming wise] was Auction house abuse. Buying all of a single item and re posting it for 4-5x the profit. Thats the thing you'd want to go after, not farming/power leveling. Farming is not fully to blame for market abuse either, it can be done very easily and for very little. The auction being so over priced is what encourages people to farm so they can drop 20+ billion into a character to enjoy CoH their way. Without those kinds of people, half of the Trials wouldn't ever get finished. Theres a reason the Paragon team never went after farming directly, and more after bugs that let people get to 50 in an hour. [If farming was a problem, there wouldn't be mission resetting more than X amount of times per day]
No one ever made money cornering a market. For one thing, you could never get all the supply. There were always some that were priced at like a billion.
Second, you have to have a ton of money already because you have to keep bids in place to soak all the new ones that are listed on the auction. In fact, you have to claim them and delete them. Think about it, when there are 5673 Nevermelting Ice for sale you have to soak a good three thousand before the price starts to rise. Even if you relist many of them at an inflated price, you have to keep buying because joe gamer just went and did a level 25 mission and got 5 that he listed for 1000 (cause it saw it selling for that) so you got to buy all those.
Third, you can't do anything else. If you leave for a few hours, the supply, while not as deep, has started to replenish. Unless you have a consortium, the longest effect you have doing this is about 1 day and a half.
Fourth, even at the height of this manipulation, you can make a bid and it will get filled (if you are patient)
Anyone who I knew who did this lost money doing it. I usually complained about it because of the pointless nature of it, but the long term effects are nil. Personally, I never saw the appeal of doing this just for grins.But your mileage may vary.
But if what you are talking about is high prices on items, get a mirror. The buyer sets what he is willing to pay. As a seller, if I can't get a decent return on a item, I stopped selling it or reduced it to the rate that people were willing to pay. What choice do I have? I can't force someone to pay 500000 for a luck charm. All I can do is list it at what I think it will sell for and hope that someone is willing to pay that.