Somehow that doesn't work this way. In israel monopolies and price gouging of food is pretty common(not 100X, but maybe 2x), and i haven't seen no violent acts.
You'll get your stores raided if you control and gouge something like food and water though, possibly ending with a head in a grocery cart. Police might even help.
Cable has a bit more leeway with the crowd I'd imagine, though there'd still definitely be consequences. Just not as dramatic consequences. I'd hope people protest gouged cable prices peacefully.
You can if you corner the market and the good is required like food is.