Many ICOs now have KYC procedures so it is becoming not enough to just use VPN..
Americans are excluded from this party..Are there any roundabout ways?
KYC is using for safety, of course they have reason about it. I believe in ICO web has been explanation about why KYC is needed and you can also join their communication channel ( telegram ) to asking about that. Not all ICO use KYC, you can find another ICO or maybe change your style. Meaning, you can participated in ICO after listing on exchange, you can buy it from there and most ICO has low price after list ( investor become trader ). Try it and good luck with you.