I have a trading acquaintance who runs his own HFT firm. Spends six figures a month in overheads, writes direct to the exchanges, connected to most of the worlds exchanges, (including jurisdictions where you need reams of paperwork to establish any sort of trading presence), and has worked massively hard to create and develop opportunities. This operation needs to take in every tick and every change in the order book for every contract tracked. Assembling, processing, compressing and storing that data is a massive undertaking in itself. Most true arb opportunities are gone by 70 micros. He uses some fully automated strategies which trade 10-100 contracts with a hold time of a few seconds, for a total of 20-40s of market exposure per day, leading to multimillion dollar profits per year. HFT is tough, many firms have gone under in the last 18 months due to rising costs of technology and robust competition. Its a crowded space now, with the low hanging fruit long gone and I give kudos to anyone who is still doing it successfully.
This is somebody who has used his intelligence, skill, and hard work to build a useful and profitable business which employs a lot of people and directly funds innovation in technology which ultimately benefits everyone.
People like you who advocate for using state violence to ban innovation and protect your own limited point of view are downright dangerous. And it is clear that you are wilfully ignorant about how markets work generally and HFT in particular. For you, no it is not worth trading. Do something else with your life.
With your attitude, it isn't possible to be a winner.
There have always been bogey men to blame for losses, for those who don't take any personal responsibility. 20 years ago it would be the specialist screwing you or the guys in the pit.
Now it is HFT.
Ironically, in the old days of floor trading, the barrier to entry was the cost of a seat on the exchange. While a useful service was provided by locals, there was also a lot of corruption and economic rent seeking. Ironically, the markets are a lot 'fairer' under HFT which has substantially higher barriers to entry than the cost of a seat. I suppose you'd rather go back to the days of paying a spread of a full 1/8th rather than a penny and having your large orders front run by your brokers buddy in the pit though?
If you want to know more:
http://www.smh.com.au/business/debunking-myths-about-highfrequency-trading-20121001-26uwo.html
http://www.elitetrader.com/vb/showthread.php?threadid=266552