Why do you have to boycott such ICOs? For me, I don't boycott ICOs simply because they are asking for KYC. I invest in ICOs because my personal assessment and the reviews I read about their project are saying that they are going to become successful. The KYC will follow much later. If I found out that the ICO I want to invest asks for KYC then I will just comply rather than totally forgetting the prospective gain that I will have from such ICO investment.
Because that is the only way to change things. If the majority of ICO investors would boycott ICOs that require KYC, then ICOs would soon notice this and stop demanding KYC.
And the problem would be solved.