Of course. It is a choice of anyone here whether to invest in new projects like IEO or to invest in some reputable one like binance or in other established projects. IEO is still a way to fund raise money and we can't control scammers to find a way to enter IEO. Though it is hard to choose where projects to be invested but taking a risk will always give you a 50-50% chance of being successful or not.
Avoiding promised high profitable IEOs, and choose IEOs from established, reputable exchanges, will help investors avoid as many scam IEOs as possible. However, the fact is not all people can follow the rule and do this determinantly. Sometimes, they turn into greedy investors, and lose money. Most of time, greediness will lead to incorrect decisions, that in turn cause losses for their investors with their wrong investments. If they don't want to take risks and are not able to acceptable losses from IEOs, they should avoid IEOs at all. There are already so many opportunities on crypto market, with old coins/ tokens. I don't think IEOs is the only option to get returns from investments, and of course not the best one.