True, but at least in prison you're (usually) fed… which may NOT be the case if you're fired from your job, put on a list, and blocked from the industry.
The linked report describes a case study of a prison where rat droppings were falling from the ceiling into the prison kitchen. It also states 75% of surveyed prisoners reported being served spoiled or rotting food.
Only if it is proved to a criminal standard (i.e. beyond reasonable doubt) to be intended to encourage an act of violence. It it is an expression of anger it is legitimate free speech.
So did the one they're replying to. They're just replying like-for-like.
It's typical that when someone is arrested for "X action with Y detail" (e.g. buying a knife with intent to kill someone) people who oppose the arrest will only state the X (and for some reason this works). To correct the record when someone says "I don't expect to be arrested for buying a knife", "I do expect to be arrested for planning to a murder" is a correct response.
but not landed you in prison or disappeared, I take it?