That would be inline with Australia Post regulations (for example). When you express post something you must sign the declaration on the package and provide photo ID which is recorded.
But then again airlines don't want any human interaction with passengers checking in: not even an ID check let alone signing a DG declaration.
I saw an ad today for a line of garden equipment with a 40v, 4 amp/hour lithium ion battery pack. That's the kind of thing that we can look forward to unwittingly carrying, complete with exposed terminals.
Earlier this year I purchased two brick sized lithium polymer batteries which arrived in an overnight bag from Melbourne, no declaration, no insulation on the terminals, unpadded. When I asked the seller he said he shipped ten a day that way. Well, he doesn't anymore.