All balloting systems have "problems" of one sort or another. But I'm a firm beliver in the KISS principle, Keep It Simple, Stupid. Most people can handle paper and ink, and illiterate voters can obtain qualified assistance.
The DRE method lacks a means of audit that is sufficiently transparent and reliable to satisfy the voting public (if they bothered to peek behind the curtain), and I agree, set the stage for sham elections.
We aren't very far removed from third-world election practices, that is, adopting DRE, in conjunction with an efective ministry of propaganda (already in place) would facilitate the perpetration of sham elections in this country. It is possible, and will happen eventually if the people allow it.