I'd even argue that the juggernaut BTC was _designed_ to be trackable, and as the recent history shows, law enforcement successfully and multiple times did exactly that when needed - tracked, identified and penalized bad actors.
I suppose you're right that there wasn't any requirement for that design for the ICOs to be scams, there just wasn't any particular need for them to not be scams.
Virtually all (actually all?) ICOs themselves have been designed to have scam friendly terms-- e.g. no real ownership or control for the buyers, no accountability for the sellers, and little to no transparency. Even the least scammy of the ICOs have some term or another that effectively enables their issuers to just walk off with the funds with no recourse in the contract.
Non-native English speaker here but doesn't "by design" refer to something being designed explicitly for that purpose? I agree that lots of ICOs were indeed scams and/or attempts of just taking money for low-quality work, but I don't think fund-raising was initially designed for that. It just happened to be that lots of fund-raising are scams.
But to say that it's by design it's going a bit far, and making your point weaker, not stronger.