Christmas idea gone bad?

I had a great idea come from a close friend of mine this year.  There is a Recovering American Soldier Medical Center in Washington D.C. that you can send Christmas cards and good thoughts to.  Well, I did over 75 cards and really felt like it was a good idea.  Then yesterday I received all of them back with a note from the mail carrier that if the cards weren't addressed to a specific soldier then the Medical Center would not receive them.  O'well, I guess just the good thoughts that I had going into it will be enough for them this Christmas Season.