yah there are untrusted ICOs but there are still who are trusted
try visiting the ICOs rating at icosrating.com on this site you can see the currently running ICO and the project they are leading and also the status of their project. I prefer looking here first before joining any Campain..
Also better review the site and all the information about the ICO and the project to avoid misfurtune..
I also choose a campaign with a good promising deal ...