I also remember getting chewed out in the grocery store by a woman who recognized me from the sticker project (small town, one gas station) who told me that the gift card I handed her wasn't any good when she tried to use it. I found out later that there had been a glitch and some of those cards were not activated.
The company also had a hissy fit about their vest return saying it hadn't been sent back, I had to scan the copy of the post office receipt to PROVE to them that I'd returned it.
Her Serene Majesty, Cettie - Goat Queen of Zoltar, Sublime Empress of Her Caprine Domain