Even if you somehow can detect any scam, I think they will still be able to adapt. And it will be even more difficult to recognize them than now. No one was able to eliminate criminality, nor in any sphere. In general, the idea is interesting.
Criminal activity will always be there since people always want to get something without doing anything, this is why criminals try to get what someone got in a lawful way and taking it away from them, in fact that is what we see all the time in this market, people want to multiply their capital without doing any real effort and that is why they invest in icos without doing their due diligence in the first place.
If people took the time to do their due diligence they will realize that out of 20 projects 19 are scams or projects that are impossible and that only one of them has any real chance of becoming a real project and when the odds are so bad people soon realize that is a bad business to invest in icos not only from the point of view of earning money but also in terms of all the time they need to invest just to find a decent ico.