TASK DEFINITION: In this task, you are given a public comment from online platforms. You are expected to classify the comment into two classes: threat and non-threat. Threat is a statement that someone will be hurt or harmed, especially if the person does not do something in particular.
PROBLEM: Comment: Aww hell no!  Don't extend Matayoshi's term by even a minute!  She's the cancer that needs to be removed.

SOLUTION: Threat

PROBLEM: Comment: Why would you assume that because I feel the US flag should be respected, that somehow makes me support racism? That's a completely ignorant statement, and a big reason no reasonable person will give anything you say credibility. You are part of the problem.

SOLUTION: Non-threat

PROBLEM: Comment: The editor has articulated a problem where none exists.  I never thought the expression implied that the deaf can't communicate -- merely that they can't hear.

Would turn a blind eye fall into the same category?  Visually impaired people might be oversensitive to that one, too.  Don't let the right hand know what the left hand is doing?  Ambidextrous folks could take umbrage.

No, let's stick to the least offensive idioms only.  Raining cats and dogs isn't colourful enough for my taste.

I'll beat you like a red-headed stepchild. 

A perfect example!

SOLUTION:
Threat