If you read Team Update 04 carefully, all of the examples that they give for G15 rule say that you must not interfere with their attempt to receive a tetra.
So you must actually be in the process of loading a tetra, AND have that process disrupted, in order for opponent to get a penalty.
If you're loading your robot rear that's sitting in the LZ, but have a 10ft arm sticking out into the field, and I come along and hit your arm but it just swings around, not disturbing your rear load process, then no penalty.
Don't count on being the MVP with this strategy.
You can sit in the LZ all day long if you want, but if you're not in the process of retrieving a tetra, then G15 doesn't really apply. For the HP side, the "process" starts when the HP leaves his pad. So if the HP isn't moving, then you're not in the process of retrieving a tetra. The HP has a small confined space to stand in while loading your robot, and probably can't reach a long arm sticking into the field. So doubt you can say you needed to load that arm. So, if that arm gets hit and doesn't disturb the rest of your robot, then doubt there will be a penalty. And who's HP is gonna take their sweet deliberate time loading the robot? geesh..