I'm all about the free market.  The black bot though just messes up the volatility of the coin.  Maybe it would be better used on a higher volume traded coin.  You can actually make much more profit buying and selling in bigger chunks at a wider span of price.  The black bots strategy makes so little from every trade, and slowing down the market creates even less opportunity for all of us. I mean who wants to do a, buy where you have to buy at 10 different prices to get some coins?