http://www.maniacsolutions.com/network-marketing-wikipedia/

If "Dark Pools" trading be outlawed or regulated by total transparency or alone … and why?
Dark liquidity pools (Also dark liquidity pools and dark) across the networks providing liquidity does not appear in the order books. This is useful for traders who wish to move a large number of shares without making himself known to the open market. Dark liquidity pools offer institutional investors many of the efficiencies associated with operations the pockets of the public limit order books but without showing their hands to others. Dark liquidity pools avoid this risk, because neither the price nor the identity of the company trade shows. http://en.wikipedia.org/wiki/Dark_pools
Yes should be left alone
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