Most of these "theories" are either bogus or badly researched. The "oil theory" doesn't take into account several factors (such as an increase in supply as price increases... Canada has a lot of oil, but it costs a lot to purify it from the sand it is in... but with increased oil prices, it is profitable, etc). I'm mean seriously:
Build a biotech lab in some obscure country and hire some bad guy scientists who share your evil ideas. Now, piece together a version of Ebola that spreads through air. Design a new, upgraded version of the flu, or AIDS. Alter the camel pox virus so that it infects humans. Youll find all the basics you need to know in the scientific journals and textbooks.
Come on. AIDS? Please, the best disease would be small pox. Any conspiracy theorist knows that.
I think this site is largely bogus, blowing small factoids out of proportions.
Also it helps in that I strive to attain my own extermination... so doomsday profecies are not that scary all in all.