2. Why is it that a belief in an HIV/AIDS conspiracy results in substantially lower condom use?*
Surveys show that about 25% of Blacks, 20% of Latinos and 10% of Whites believe that a government conspiracy resulted in the creation of HIV/AIDS. I'm sure that if I looked up the surveys for the other conspiracy theories, they'd be alarmingly high, too.
*This is from this study, but it's not entirely clear from the abstract if they ruled out external factors, such as economic class, as causing the correlation.