I would have informed whoever was collecting the money that I wouldn't be paying for the session.
I wouldn't have bowled at anyone who did this either. I would have still stood there at the top of the run up, leading to that inevitable delay where every other bowler thinks im Going To run in, eventually one of them gets fed up waiting and runs in to bowl instead. This 'dead' time winds the batsman up no end. When he moans at me, a quick wink and a comment along the lines of 'Shall I bowl pointless bumpers at you mate?' Should suffice.
Short stuff is ok as a variation, but it's absolutely pointless every single ball. And the reasons your guy has for doing it are pathetic Wilkie. I'd be telling him what a pathetic drip he is at every opportunity, in front of as many team mates as possible.