I suspect that if HAARP actually works it has fair more capabilities than any of us suspect. I also doubt if large sums of federal money would have been spent to build it if it didn't have perceived military applications.
Then again, it might just be the theme of a Michael Crichton novel and nothing more.

"Power tends to corrupt and absolute power corrupts absolutely. Great men are almost always Bad Men." Lord Actin 1887

I fear we live in evil times...