Absolutely. All over the world any sticker will be ignored, and may even illicit pointed questions about challenging authority or standing rules on security. I put my film in an X-ray bag once en route New Zealand, but they wanted that opened for hand inspection, and then it went through X-Ray.:rolleyes:
If you're really keen, though, the Brother P-touch label makers are unbeatable for running off 1 or 100 labels of anything on a vast array of tape types.