Fear, uncertainty, and doubt would be the feelings I think Melody is trying to instill, not necessarily the ones motivating her. She seems motivated by anger.
This does not necessarily mean that fear, uncertainty or doubt are irrational feelings about the prospect of trusting one's infinite future to apparent organisational incompetents. Especially sincere ones, as sincere ones are much harder to convince they're doing anything wrong. Organisational robustness is actually really really important.
I recently found something that may be of concern to some of the readers here.
On her blog, Melody Maxim, former employee of Suspended Animation, provider of "standby services" for Cryonics Institute customers, describes several examples of gross incompetence in providing those services. Specifically, spending large amounts of money on designing and manufacturing novel perfusion equipment when cheaper, more effective devices that could be adapted to serve their purposes already existed, hiring laymen to perform difficult medical procedures who then botched them, and even finding themselves unable to get their equipment loaded onto a plane because it exceeded the weight limit.
An excerpt from one of her posts, "Why I Believe Cryonics Should Be Regulated":