No, there's no remote kill, and the phone home function is optional and for your convenience only. Our ASICs have a crypto mechanism that checks a license file that you must supply to the system. The license file specifies how much mining the system will do, in accordance with whatever license you've purchased. For the C200 units we are taking orders for currently, the license will be unlimited.
That sounds a lot different than:
Mining is controlled via an online control panel hosted by LargeCoin, which allows you to direct mining shares to the pool of your choice and manage your entire LargeCoin cluster in one convenient place
So which is it?
At first glance the idea of locked hardware rubbed me the wrong way but I see the advantages. One could pay a deposit, get a rig w/ a time locked license file and after testing decide either to pay full price up front for unlocked rig or pay monthly lease getting new license file periodically.
Still locked or unlocked I would want the rig completely outside the control of LargeCoin.
Why not simply have a license file issued and used locally which has encryption key for either limit the number of blocks/hours/hashes or unlimited mining depending on the encryption key provided. The whole calling home to a remote server which manages the rigs and "directs" them to a pool of user's choice is a deal killer.