To avoid scam project here my advice :
1. They have refferal system ( not all but i really hate this thing)
2. Give you big bonnuses for presale like 50 to 100% bonus.
3. Poorly design website
4. New create twitter account ( can be variable but dont focus in this one)
5. Their team unprofesional, and unknown
6. Their mission is to big and seems unreal and cant be happend.
I mostly watch, review and oberved their sites, twitter posting, youtube and of course facebook if they have the kind if quality to introduce their projects because for me don't just the book by its cover will not be applicable anymore by this time because our money and efforts is at stake. Members of the team of the certain ICO should really have to be carefully review as well because some are actors.