I can understand. I remember some time ago there was a Kickstarter campaign for plasma jet electric thrusters for spacecrafts [0]. I was as much sceptical about them as I'm about this campaign right now, but that time the project seemed to have turned out to be legitimate [1].
[0] - http://www.kickstarter.com/projects/2027072188/plasma-jet-el...
[1] - https://news.ycombinator.com/item?id=4726451