There are worse things in life. But that's not what I do. I found that link on a reputable site, and I had read a lot about HFT but never from someone who actually worked on it. I did find that article an interesting introduction, which is why I posted it here. If it had been a waste of time, I wouldn't have posted it.
I'm not saying it made me change my mind on HFT, but it was a good reminder that not all computer-based-trading strategies are the same, and some are definitely more market distorting and not beneficial socially while others can probably actually help with liquidity and reduce spreads. As with most things, reality is probably in the gray zone.