Fake ICO and bounty are not easy to identify, because it will not be clearly stated in the White paper that it is a fake project. But there are many things which can be put in place to know if an ICO is actually a fake or not but this as to be very careful with.
* clearly read the white paper of the project
* the purpose for creating the token. Then note if the token will have its own blockchain or use other blockchain eg ethereum or bitcoin
* the team behind the project have to be consider. Their pics as to be clearly visible, name  and where they can be found should the project....