Honestly, I think both of those things would be funny to watch, but not funny to experience from the victim's standpoint.
However that said, I and very much in favor of rookie hazing. If done responsibility it brings the team closer, and helps out the learning curve with rookies, to show them how the team works so they can be quickly integrated.
i agree on both points you made, especially about rookie hazing.
however, even if everyone found the whole poo in the shoe and stealing rims things funny and no one cared, should it be Gilbert Arenas, the leader of your team doing it? especially since leadership is something thats come under so much scrutiny in washington. it just seems like something a proven veteran role player should be pulling, not your leader. Like Id imagine a player like James Posey or Eddie House being the prankster on our championship team, not Pierce, Garnett, or Allen.
i just imagine gilbert locked in a bathroom stall trying to find a comfortable and accurate way to take a dump in a sneaker, while the rest of the team is in the film watching him shoot 6-24 and play matador defense on their loss to the Oklahoma City Thunder the night before. Just seems like since the leader has no sense of accountability and priorities, the young guys and role players dont feel the need to.