HAARP, simple science or military gone Tesla crazy?

Have you heard of HAARP, and your feelings on this?

• -haven't heard of HAARP
• -heard of it, but not sure what it is
• -just a harmless military science experiment
• -believe the military is up to more than just simple science
• -believe HAARP may drastically harm the ionosphere
• -believe HAARP could cause unforeseen harm in many ways
• other

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HAARP is something I've only recently become aware of, yet something about it immediately sounds concerning. The simple fact that the military is conducting a science experiment in the atmosphere is enough to make me wonder, "Okay, what the hell are they up to now?" I don't know any reasonable person that trusts the military to make sound decisions that consider environmental, human and animal impacts into account.
There are loads of websites actively encouraging the HAARP discussion. I found a pretty good one here - http://www.guerrillacampaign.com/Hugh.htm

Here is some of what Hugh has to say regarding HAARP;
I still cannot get a definitive answer on the ultimate purpose of data gained from these heaters. Depending on who you believe, it's either aimed at improving the performance of space based systems that are being built anyway, or it's a rediscovery of The Secret Tesla Death Ray. It's either a great new source of low-frequency radio waves for military comm or recon, or a new generation of directed-energy weapon that will terrorize the planet, turning the Pax Americana into global fact, allowing a despotic U.S. government to roll over the world and divide it up between corporations.

This web page generates more e-mail than all my others put together. This mail is private, and off the record, which is kind of too bad, because it would make a book in itself. There are people who hear HAARP in their heads. There are people who blame HAARP for everything from their headaches to giant power blackouts. When the Kosovo war came, it was pretty much universally assumed that HAARP was participating. Since HAARP did transmit during the period, rumors ran wild.

There are people, usually with physics degrees, who have "done the math," and are convinced that the military is only a few years from global domination, burning cities, charred bodies, a civilization under a sword of fire. There are people, also with physics degrees, who tell me that the whole thing is radio astronomy, it's geeks with arcane degrees, it's data that will improve life and freedom.

What are your thoughts on this? I'd love to know.