I thınk you can't avoid scam ICO's if it is in your faith 
because they can look legit and after six months past of their ico they can say we are done we can't deliver this product because of this because of that bla bla.. You can protect this situation with blockchain or nothing else. If you are not a risky person you need to go on with BTC LTC and Eth or really good proven altcoins.
because they can look legit and after six months past of their ico they can say we are done we can't deliver this product because of this because of that bla bla.. You can protect this situation with blockchain or nothing else. If you are not a risky person you need to go on with BTC LTC and Eth or really good proven altcoins. 'If it is your faith' hahaha..funny you
But I can agree with though, if its really ones faith to always encounter scam ICO then its inevitable. One just have to be very careful..
But I don't understand what you mean that you can protect this by blockchain? How do you mean?