In the face of too many scam tokens/projects,here is a philosophy that can be helpful, quotes below
"All tokens/ICO/projects are worthless until you can provide beyond reasonable doubt that they have value "
If you can do that for any project, chances are high you won't be a victim of scams.
What is your own philosophy?
The problem with that philosophy is that you are going to miss many opportunities since many coins do not have anything to show to you when they ask all that money, so if you do not like to invest in icos that is fine but there are many people that despite the fact the developers have nothing to show for the money they are asking, they will invest since they want to multiply their capital as fast as they can.