in my opinion it's very normal because some ico for investors have to give kyc because with the existence of the ico founder, I can find out who the investors are to provide support and with the presence of ico's founders it can be safer because there are some countries that prohibit the circulation of ico.
When it comes to legalities then they would need to follow up on whats being said or required. If they need to restrict particular investors then they would need such KYC procedure.
I think that KYC is there for a good reason since we wouldn't want money laundering to flourish. I would never give out my personal information to shady ICOs though since they are not worth the risk... It's a good thing an ICO marketplace like Menlo one is launching soon since we will only be required to submit our IDs once making ICO investing very convenient.
KYC blah blah blah for avoiding money laundering yes it is true but its fully contrary why crypto is being created.