If the startup project conducts a IEO sale phase, they will not ask you for personal information. Especially if the exchange is decentralized. You should also pay attention to where the project plans to add its tokens before deciding whether to invest there.
You guys are making it off-topic now. We're clearly talking about STO from the beginning, so I doubt any legitimate STO would do the same like Binance IEO.
It's even more interesting to see that one of the (claimed) STOs that run their bounty campaign stated that the hunters don't have to undergo KYC to get their tokens while investors have to do that. If that's true, maybe there are different laws that apply to STO. I always assume that hunters would be considered as investors too.