Two key/tag inputs - enable/disable. Or just disable (logic =1), then call it a "Kill Switch".
Like the Logic Splitter, it affects all parts downstream on it's connection graph.
Disables all logic input/output of those blocks.
Would be a simple way to cease the function of all the drones in a swarm, for example.
Might need a counterpart, like the logic connector... Might be able to build the functionality into the Splitter, instead, depending on the envisioned use cases.