Any successful ico would always chart their token scale whether a fraud ico would attempt always to make it hide. So all you need to do is to review the tokens scale progress to avoid scams.
We cant rid out those people from here, they are very wise and strategic which be hardly to detect at first. It really needs ample of time to search and do further study to find out if a certain project is legit or just a fraud. Mostlu they are using other identity to hide themselves and a very attractive rewards.