when on base (at elmendorf at least) they made it illegal for us to park in the stripped area next to the HC spots or at the end of the isle. I still did it anyways and never had an issue... though a co-worker had his R6 kicked over cause it blocked the fire hydrant!
I usually only park in an actual spot if there's another bike already there or someones riding with me. If I park in a spot with a curb... I put my bike against the curb face'n out. if no curb I sit it side ways in the spot about 1/2 in... so hopefully a cage sees it be fore running it over.