Glue it to the wheelchair. If someone steals that, he has worse problems.

But would a casual laptop theif think to check escapologybb's pockets?

Well, OK, a mugger might, but would they recognize little fob thing as something of import that must be close to the computer?

I'm not sure they would care. I don't know thta much about Macs, but my assumption is that you can do a format/reinstall just like any other computer.

Or, you know, just fence it.