After seeing just how much wolf0 was able to optimize the CPU I realized just how much a few miners with properly optimized code could dominate. And if I was:
1. Someone who only care about definite profit, I could get such a miner and dump for more than it costs me to mine.
2. If I was a competing coin, I could keep the price of the coin deflated.
I think whoever can "steal" electricity (i.e.: free electricity) can do more damage than optimized miner. Every Sat is profit.