For you to find out the scam ico here is my own opinion which I think can give an idea for you,

1. If the Owner or developer is anonymous it means you need to avoid that ico project.
2. If they don't have a website it means the project is bogus only.
3. If they're community to their social media has a few counts only you better think about that.

Then, I suggest you to buy coin on exchange that more like it and better also.