I fail to see how HFT would benefit de-facto LFT. LFT to me implies true *investing* whereas HFT implies *trading*, which are completely different beasts. If an LFT is being patient, waiting for a good business to be purchased as a good price, timing the market is irrelvant. If the ask goes up $0.01 because of an algorithm and my margin of safety goes from 20.00% to 19.99%, guess what, I still ample MoS to work with; i.e.: my risk is still mitigated.

HFT should only concern those who are interested in timing the market. Alpha comes in many forms, and for LFT--investors, not traders--this means purchasing a good comapny at a fair price.