Do you agree with Conspiracy Charges?

(Conspiracy: a secret plan by a group to do something unlawful or harmful).

What are your thoughts?
Why?

Thank you :)
Update: For example, if two people plan to rob and bank and they go buy ski masks to wear during the robbery, they can be charged with conspiracy to commit bank robbery, even if they never actually rob the bank or even attempt to rob the bank. Buying ski masks is not a crime, but it furthers the conspiracy to commit a crime.
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