It really is not fair to take someones oppertunity away to speak.
When silencing people completely, you take away their chance to ask questions, to understand things.
People need to learn through experience, need to make faults, and find out what they did or didn't do wrong.
Our voice give us the ability to communicate, to scream, to express love, to bring a message across.
If one were to take away someones voice, one is really just saying: fuck you, you don't exist.
People can do this in many ways. Ignore you, tell you to be silent, etc.
All those actions really come down to the same thing.
Being denied to exist is just plain aweful.