Considering that the only times you dig your driver's licence out of your wallet is as an official form of ID or if you've been pulled over, taking the piss is a risky little game to play.
Which brings us to the Sh*tAdelaide Facebook page which has, once again, come through with a photo highlighting a rather spectacular addition to one Aussie bloke's licence.
Sent in by Instagram user @ali_cobra_1, the shot outs the South Australian's official signature as a pretty fetching side-profile of a penis.
Fittingly, the only other piece of information that we can glean from the snap - aside from the expiration date - is that the guy is an organ donor.
Just goes to show that drawing dicks on things will probably never get old.