I don't understand. Using the multicast quote stream (which costs a few thousand/month) is an "exploit"? Or are traders somehow obligated to ignore the actions

I don't understand. Using the multicast quote stream (which costs a few thousand/month) is an "exploit"? Or are traders somehow obligated to ignore the actions of other traders? Perhaps anyone using a computer is obligated to act as an agent for people without a computer, rather than a competitor? I truly don't understand what you are arguing. Could you please explain the mechanics of what you believe should be illegal?