Make as exact a copy of an Ikea lamp as possible, then smuggle it in to Ikea and place it among the others. (Conceived in collaboration with my art theory class.)
Sent the following email to Thomas Hirschhorn c/o Gladstone Gallery: "Dear Thomas Hirschhorn, Please dismantle all of your unsold installations & give all useful materials to Global Action for Children. Exchange exhibition value for use value. M. Cameron Boyd"