Also I think there is a bit too much anonymity for large players in the market. Currently there is no way to tell if a player is buying/selling his own coins (using different accounts).
They don't even have to use different accounts... it is possible to execute against your own offers.
I did not know that. I'm fairly sure it is impossible at Kraken.com as I did by mistake once. My order got canceled if I remember correctly. That was some time ago so I could be wrong. But either way it would help if individual trades of large players could be identified like in other markets.