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if a particular news item or a service is to be disrupted for a short while or a period of time - there are couple of ways. Sensoreship by blocking with the keywords (at the application layer of internet with proxies), blocking with the IP addresses, use DMCA take down tactics used by the likes of MPAA. If none of that works a entity either a nation state or someone else can trigger a DDoS attack targetted at the news outlet/IP range/hosts or entire data center taking down the content.. In the recent times nation elements have tagetted massive DDoS attacks of GB/ps in size to take down targets. Counter DDoS companies like Cloudflare are also doing their job by providing PB scale networks to prevent DDoS. For entities like Steemit its eseential and mandatory to have DOS and DDoS prevention, availability over ToR, i2p etc to prevent any and all forms to censorship including but not limited to DDoS