If, in their early morning fog they forget…then you have a smoking pile of melted plastic all over the cartridge. Its a good thought but that could be a real stinking mess that would only happen once I am afraid. In doing some more research the soy inks seem to not have much of a odor when they burn off (bit of smoke though and that’s not good) so printing is maybe a option. That means of course because the printing will be destroyed in roasting you still need something that they can keep in hand as a reminder that “oh yea that was great lets get that again!” piece.