Heck, what rocket will they use? A delta rocket? That thing as a pay loa of 500 kilos.
Not at all.
Mars One expects to use the Falcon Heavy, from Space X. It's got shots to Mars among its basic design goals - payload is designed to be 13,200 kilograms (29,100 lb) to Mars (considerably more to low-earth or geosynch orbits). The Falcon Heavy is based on the Falcon 9, already in use. The Falcon Heavy is expected to have its first test flight this year, and its first scheduled customer in 2015. The Falcon 9 program has had significant success (IIRC, out of 8 missions, one secondary payload had a problem, but all others were fine), and there's no reason to suspect that the Falcon Heavy isn't going to happen.
And, as a friendly suggestion - you probably want to be very, very careful about suggesting folks are dishonest. In fact, I'd avoid it altogether, if I were you.