I reckon over the past 20yrs I've probably worked in roughly 4000 different houses/offices etc, in Liverpool and the greater north west, and I'm guessing I've left a KAGS scrawled on at least 20% of them.
On the backs of kitchen units, under flooring, behind tiles, behind wall panels, on the side of baths and the back of bath panels, on the underside of floorboards, across the tops of doors, etched onto slates on a roof, on the backs of loft hatches and on and on.
If there's a space to scribble, I'm all over it.