I guess fraudulent is not preventable but you can minimize being a victim if you will be very vigilant in your actions towards your investments. Doing more research before engaging to something which includes money will reduce the chances of being a victim of fraudulence.
Specially when sending some information about you in online. That's why i really hate when they're requiring KYC on a project to receive a payment, my information can be used or sell by them. It's very preventable but if you really want to risk because of the "benefits" of a platform/project then you should and take the consequences.
for now, be careful and careful to choose the ICO project to be used as an investment place, because most ICOs are now deceptive. so don't ever choose a strange project
Yes, ICOs do not have a good reputation at the moment, but there are still some interesting projects that I think will give a lot of satisfaction in the future. The point is too chose wisely which projects are worth investing.
ICOs are very trash today, most of it are just scams and will waste our time, that's the reason why I'm sticking to btc campaign than alt camps.