It feels like people don't learn from their mistakes. Or forgot how popular ICO was in 2017 and how it is treated now. With IEO it will be the same with time.
It's sad to think that exchanges will be a way for scam projects, exchanges should evaluate more the project before even listing it. It will affect their reputation, we should at least learn by choosing what exchange to trust.
I am sure that the big exchanges are doing so. before entering into an agreement with a new project, they study it very well.