Q: What is the moral difference, if any, between a shitposter and a civilian?
A: A shitposter challenges the status quo through dank memes, and risks bans and diminishing relationships in order to promote freedom of thought.

You fail.
Not only did you fail to define a civilian, or any distinction, but you omitted any moral relevance.
Lastly, you recited the wrong definition...
A freedom-protector challenges the status quo through dank memes, and risks bans and diminishing relationships in order to promote freedom of thought.
Try, try again.