a colleague mentioned this morning how, in his younger days, his friends would devise methods to get themselves into clubs without paying the cover charge. simple manual transfer of the uv stamp from hand to hand didn't work, because that inverted the logo, so they learned to use a credit card as a tool for lifting off the ink and transferring it cleanly. eventually, they graduated to carving homemade stamps from potatoes - whole sets of them to match the one the club happened to be using for the day. i was quite impressed, i must say. labouring over dishonesty is not easy.