Yup. Like I said, I personally would be comfortable with offering a badge to indicate donor, but anything beyond that is questionable.
I suppose you could say that about any badge. Apart from the 'friend' badge of course :lol:
Why dont you stick with the Tshirt idea - its private, and those that do buy a Tshirt will know they are helping quietly behind the scenes - without actually being publically recognised.
I guess what I am saying is; those that want to donate - great - buy a Tee.
Those that are not financially able but really really want to donate, are not