I have joined three but signature campaigns and bounties only since I am not into investing in presale. We already know the risk brought by these projects but sometimes it is worth trying. If we are planning to take part with ICO's just be careful and aware of it's purpose and background. Scams are anywhere and will appear anytime in an image of an ICO's with too good to be true road maps. There are actually people that are victims of those scams let's just beware of too good to be true projects. Research is highly recommended most especially to those new in these investment.