The problem here is that there is a fine line between thought crime, criminal conspiracy and actual criminal offense to incitement to commit crime, much of it is subjective and due to the nature of the language used i.e. semantics such as ...
I think you have it right there
There needs to be a balance between people openly using "social media" to conspire to commit crime - which no one wants,
and a whole lot of other "conversational" forms of comment
including humor, sarcasm, open discussion, flaming, pot stirring, academic excercises - like we do here sometimes - etc
The problem is how and where to draw the line, and that will take a wiser head than mine to figure out.
From over here, "some" of the sentencing does look a bit over the top, but I'm not across all the details !