Someone explain to me why is this any different to HFT bots trawling the web and reacting in microseconds to any adverse "news" about Boeing? ("news", since I'

Someone explain to me why is this any different to HFT bots trawling the web and reacting in microseconds to any adverse "news" about Boeing? ("news", since I'm not in that industry and don't know if they only react to official media, unofficial media - aka blogs etc, tweets, etc)