Never attribute to malice what can be explained by incompetence 
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I suspect accidental sabotage is much more common than intentional sabotage in the toy train world.
Having a loco tied to a single remote with no possibility of another remote device controlling it unintentionally seems to me to be a safety feature, but we'll see how it plays out in the field.
Obviously the greatest opportunity for misadventure is with DCS or Legacy/TMCC. However having identical LC or LC+ locos being controlled by two identical remotes could yield the same problems even faster.
We are told by Lionel that the Universal Remote for LC/LC+ makes this a non-problem for those using this new handheld device (or the new Bluetooth phone app).
Ironically, the superior, newer, but cheaper digital radio communications of LC/LC+, and the superior firmware in the Universal Remote create a more secure communications link, less subject to unintentional or intentional interference.
