People refusing the notion of 'reality' depicted by others in society face harsh consequences, such as death, defeat, or withdrawal from society. In The Matrix the majority of society is portrayed by Agent Smith, who lives in the virtual world and attempts to murder Neo, the one who fights against the message. In this case, the One (Neo) becomes a virus to the computer that contains this virtual reality.  Therefore the only way to fix it is to kill it off.  Like in Plato’s Cave, The Matrix  'chains' Neo from the beginning of his lifetime.  Eventually, Neo has a rude awakening about the world around him, during which time he is told that he is “the chosen One” designated to help it. Agent Smith represents the reality of this invented world, and it is his job to bring death to those who do not believe in the perception of this truth.

As for the “chained” in The Cave, their truth is what they see before their eyes, in other words, the shadows of the performing showmen. For the first time in their lives when they are released into the sunlight, they have a choice of what they wish to believe. In that sense, their reality is shaped and they are most likely left confused.  For example,

“when any of them is liberated and compelled suddenly to stand up and turn his neck round and walk and look towards the light, he will suffer sharp pains; the glare will distress him, and he will be unable to see the realities of which in his former state he had seen the shadows”- (Plato).

If there is a disagreement between the people in The Cave, “let them only catch the offender and they would put him to death." In both the Matrix and The Cave, refusal or discrepancy with the dominant view would ultimately end up in death.