Put it on the neighbours gatepost :-) I'm half serious - I've got one at our flat outside our door. With hindsight, I should have put it at the bottom of the close with no marking - then anyone who managed to get it off, and into it, would have to try quite a few doors first, deterrent enough.
I'll end up fitting one somewhere at the new place - probably resin bolt it into the concrete wall at the drive.