Hmmm... really? It's suid on my device, and I don't recall setting it that way. But it's more than possible I did set it long ago. I've only had to reflash twice, and that was really early on when playing with some of the early kernel hacks. (And once of those was just to reflash the kernel.)

Outside of that, only about 3 other files on my device are suid, and none of them are anything you can use to break in. All the more reason to install BackupMenu and/or sshd right from the get-go on a new system.