A bad ICO will normally operate in the shadows and will be very reluctant to offer any information about the team and the peolple behind it, for example Dencity.
There are some ICOs with the scammy intentions which are very smartly organized.
They are even offering full information about their project and advisors.
If you research some more you can soon realise that this advisor is false and that they don't even don't know that they are involved in the certain project.
Thorough analyzation must be done for the revealing of the false project but even then it is doubtful if the project will be revealed as a faulty till the middle of the campaign.