The problem is "arms at your side" is subjective as well. How tightly do they have to be at your side? Do they have to be so tight that if we stuck a piece of charcoal in there a diamond would fall out? Or no daylight visible between the arm and the body? From what angle? And a referee is supposed to judge this in a fraction of a second? My argument here is reducto ad absurdium on purpose, to show that you can't remove subjectivity from handball calls. The only semi-appealing solution is to go back to what the rule originally stated (but apparently nobody cares about any more): the handball must be deliberate. I realize that doesn't remove the subjectivity, but much like the legal system, I would rather see a few guilty parties get away with it instead of seeing one innocent party (like Tony) get punished.