Stick-on barcode on Paypal fobs?

I have one of those new Paypal security fobs. Like the idea, worry about
losing the thing, or Something Going Horribly Wrong.

Thing is, it's got a stick-on label with a barcode on the back. On the
one hand, I'd think to remove it, the same way I'd remove the sticker on a
combination padlock. On the other hand, I'd think there might be some
moment in the future -- this is a whole new gadget, and it's all future --
where I need that barcode. On the gripping hand, even if it is necessary,
it seems like it'd be a security hole while I'm carrying the thing around.

Thoughts?

--
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