True evil geniuses don't reveal their intentions openly. (They also don't post this blog comment.)
LOL! You don't have to be a genius to be evil and, speaking from long, hard and repeated experience, you don't have to be a genius to a great deal of harm - just being evil is plenty sufficient. This is especially true when the person who has ill intentions also has disproportionately greater knowledge than you do, or than you can easily get access to in the required time frame. The classic example has been the used car salesman. But better examples are probably the kinds of situations we all encounter from time to time when we get taken advantage of.
I do...
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: