"People in glass houses shouldn't throw stones", meaning?

This statement means that we all make mistakes do not take judgments on people .. no this world is infallible because the reprint rights he does not see its flaws, but is fluent in seeing the mistakes of others

Do not critisize others if you have similar weaknesses in yourself

Don't judge others as if you are right all the time because everyone has his own weakness and mistakes and if you criticize them they will do the same .

I think this means that first we should correct our own follies and overcome our shortcomings  and then only we should pinpoint others.

 it means :Don't laugh at  my mistakes as long as you have your own mistakes that people make fun of.

dont hurl indecency at others...just treat the way you mean to be treated

It means we should avoid criticising others for their flaws. If we do, they will do the same with us.

lt is good to avoid unnecessary criticism because it will expose our own weaknesses or it prompts those we criticize to want to know more about us.Who is perfect among us in any case?We all fall short in one way or the other so the best way is to avoid acute angles.

This proverb has a metaphorical message that we shouldn't criticise others' flaws and ill-fatedness when we have our own.

This idiom is used to stop someone from unnecessay criticism by reminding him his vulnerability to same unpleasant criticism.

Example:

"Avoid throwing stones while sitting in a glass house", PM advised the opposition.