Clint_G,
Better it happened on land, sea, and air than space, land, sea and air. Whoever dominates space dominates the whole world.
The militarization of space is just another form of air superiority, which is just another version of "high ground" advanage. Iron-age armies used siege towers and/or Earthworks, walls, castles and hills to get this advantage. In WWI it was provided by biplanes and airships, and in WWII it was monoplanes and heavy bombers. Afterwards in Korea and Vietnam and other battlefields it was jet aircraft as well as helicopters. In the Gulf War, helicopters, satellites and TBMs. Now in the Global War of Terror it's provided by spy satellites and UCAVs.
Getting even higher ground for the release of weapons and/or observation wouldn't change anything about the reason for doing so, nor would it change the nature of warfare in any way shape or form. Primarily this is because nobody lives in space, therefore anyone who tries to militarize space does so strictly for the purpose of conducting war on Earth.
When we start colonizing the moon and Mars and building space outposts, THEN militarization becomes worrying. Not so much because it shouldn't be done, but because it is the inevitable first step towards many inevitable bad things.