here is something i do with anything that has a plastic housing or an engrave-able surface. put "stolen from your name here, phone number___ -_____," and "ask for ID".

i had a small landscaping biz till i messed up my back, on day a guy calls and says "you left one of your weed-eaters in my yard" i check my schedule book and he was not on it, went out to my building and sure enough one of the trimmers was gone[:@]