Let me know if you still can't remove it. I will come over to your place and help. I've got my hammer, cold chisel, screwdriver and blowtorch if all else doesn't work.
My tools are all American made by SnapOn, so not to worry about me using inferior stuff.

On a serious note, I can understand that you don't want to damage the camera removing the Thumbs Up. Send me a SMS and let me have a go, I'll be gentle.