We need communists just so people like you can see what a real communist is instead of ignorantly labeling everybody outside your myopic world view.
Beyond this we need to kill the outright Orwellian left/right paradigm which grossly oversimplifies the political landscape. It's not even a landscape because that is a 2D plane (or even 3D) it's a 1D LINE of left vs right and you are not even in Flatland.
Get a clue kid, Bernie is an old school commie who even had his honeymoon in the former ussr and has praised Castro and Maduro. Denying the facts doesn't change the facts, it just makes you a denier.
Hackers are just a migratory lifeform with a tropism for computers.