The only way you can perceive whether an ICO is a scam or not, is to do your own due diligence about the project, its feasibility and most especially the team. You can never know out rightly if it is a good buy for investment or not until you do all those I mentioned.

Most people only look at the catchy graphics and gets tricked by all the whitepaper Lingua, but those behind the projects will let you know if it is worth dropping your cash for or not.