Yes, if it will be used for the wrong intentions.
It is an attraction to scammers because it only requires less paperwork so scammers can easily create a fake white paper and make a lot of money.
Pure speculation. It is based on idea of a project and you are not sure if the project will succeed or not because the project might not be secure.
Network Congestion: The augment in the Online activities can be a major problem in the operation.
Government intervention: Various happenings like scams will simply decide to start regulating the ICOs.
But there are advantages in ICO;
Gives a lot of opportunities to promising projects
Little paperworks needed
The incentive innovation