Its not a whole lot of effort to write it on with a permanent marker or put a sticker on using a label making machine if you're worrying about permanently damaging your board. I've heard of an incident where cops went searching for a missing kiter because a board was found (they wouldn't know its a common occurrence) and at least if there is a name and number on the board, its easy for someone to verify you're not missing.

There is also the added benefit of the finder being able to contact you.