Binance, okex, houbi and several other IEO launches from the top exchanges actually don't force people to participate there, and hold their tokens. But it is a rule that for each IEO participant must hold a number of their tokens to be able to participate, and if you don't want to, you are not forced to participate there either. I think so, anyone who wants to participate then follows the rules and for those who object then go and try to find IEO on another exchange.
We are now in the IEO era as a way to make amends to the many scams and mistakes that happened during the ICO days. The IEO is done with the help of the exchange involved and there is nothing we can really do but to follow the rules set by the exchange and if we don't agree then we can find those that got a better and lax procedure. With Binance, one thing I don't like is that it will never be easy to participate especially with a highly marketed project and I think they even use lottery system. I am not so sure with the other exchanges but I doubt if they are introducing good projects and are not just doing it for the money. Let's see in 2020, how many of the IEOs introduced this year can still be going strong and have not experienced great decline in value or worse have gone to thin air.