Ah ok, thanks for clarification. But you've got me thinking. An eye-patch with a QR code on with your bitcoin address ... better than having it tattooed on to some part of your body, for all kinds of reasons. Think I'll produce one and start selling it!
Your customers need to wear the eye-patch all the time then, to receive donation
I guess a hat (OP's idea) would be better
Eye patches can be worn at all times. Ever worn a hat in a (decent) restaurant?
And nobody would ever hassle you about "advertising" for fear of what was under the eye-patch
I'll ask my friend about the eye patches thank you for your suggestions