I do, it's often totally worth it.
<link=http://www.apple.com/legal/itunes/us/terms.html#GIFTS>In Apple's iTunes TOS:
LICENSED APPLICATION END USER LICENSE AGREEMENT
Section G
"You also agree that you will not use these products for any purposes prohibited by United States law, including, without limitation, the development, design, manufacture, or production of nuclear, missile, or chemical or biological weapons. "
Because iTunes could play music to end the freaking WORLD with.