This I think is wishful thinking. If they already made the trade and profited, they’re not going to care about the people scooping according to what they did. If the followers-on like me overinflate or kill the asset depending on what the cheater did all it would do is damage the economy. If you are in a position of aristocratic privilege such that insider trading is possible for you, destroying the economy is an opportunity to acquire assets at a bargain.