99% all scam. SEC tweeting that they are scams, even china banning ico because they are scams
We should not generalize too much, we need to "Separate the spread from the wheat" some mechanisms need to come up...
I am curious when and what ICO you will start promoting soon.

Anyway, if investors are not protected by any law, if the developers are not accountable for their work then you know for sure it's scam.
When I will see a real company, visited by real people, with proper authorization from financial institutions, in ALL the countries they sell their ICO, then I will admit that is not a scam and I will invest in it!
Until then, all ICO's are scam until proven legit.