Gestalt Arena practice - Moby Vs Stella

[Talic]

One thing I've learned, Adumbration, is that interjecting too much common sense into D&D invariably ends up messing stuff up.

You are citing rules for snatching Items Worn.

However, A shield is also a weapon. See below:

Shield Bash Attacks

You can bash an opponent with a heavy shield, using it as an off-hand weapon. See Table: Weapons for the damage dealt by a shield bash. Used this way, a heavy shield is a martial bludgeoning weapon. For the purpose of penalties on attack rolls, treat a heavy shield as a one-handed weapon. If you use your shield as a weapon, you lose its AC bonus until your next action (usually until the next round). An enhancement bonus on a shield does not improve the effectiveness of a shield bash made with it, but the shield can be made into a magic weapon in its own right.

Relevant section bolded.

As this is the case, grabbing items is ignored, in favor of Disarming Weapons, which is the primary use of Disarm, rather than an alternate use of snatching items.

In fact, both the light shield and the heavy shield are listed under martial weapons in the weapons tables of the SRD.