Well I don't know about myself, but I'm pretty sure you would break blocks below him to try to drown him and get his stuff if he goes AFK.
I'm sure if u killed him in pvp like 10 stacks of diamond blocks would fall along with really nice armour and a really nice sword.
Eff X unbreak X fortune X along with some Blast prot X and Prot X armor with Feather falling X and respiration X.....and a Sharp X sword with looting X and fire X......simple nuff?
Id also put a bounty on him and then put his head over the mantle of my fireplace, it would be the ultimate trophy. Id have to then buy a pair of witherheads to flank it and a row of enderdragon eggs on pedestals to lead up to the grand fire-place