I have strong feelings about spoofing - that it should not, in almost every case, be illegal. While it is true that the spoofer may eventually cancel their ord

I have strong feelings about spoofing - that it should not, in almost every case, be illegal. While it is true that the spoofer may eventually cancel their orders the fact remains: their orders were dealable by any other party for a set period of time. You want to teach a spoofer a lesson? Deal on their price for size. That anyone would base a trading or investment decision on the size of the bid or offer at any moment of time is frankly, crazy. Algos are constantly changing(edit) price and never dealing. Brokers allow orders to be only partially display, balances kept in 'reserve'. There are many, many ways people attempt to "manipulate" by not showing their hand just as their are ways that show a hand (or many hands).