personally, i don't really like those, but you are right, D is for deutschland.
oh, i made my own back in the day during high school, it was on the trooper, it said "idcwyb"
and then under those letters, it said "i don't care where you've been" and it totally looked like those stickers. basically, i am sick of seeing LKN, or OBX, or whatever stickers because i never really liked them, but that's just me and i wanted to try a little retaliation.
later,
david