“Think before you post.”

That’s the chilling message that was just posted from social media accounts affiliated with the United Kingdom’s government. Amid the riots and civil unrest in the streets of Britain that were initially sparked by anti-immigration protesters, the posts warned citizens not directly involved in the uprisings that they too could face arrest even just for their speech. 

“Content that incites violence or hatred isn’t just harmful — it can be illegal,” the Crown Prosecution Service tweeted. “The CPS takes online violence seriously and will prosecute when the legal test is met. Remind those close to you to share responsibly or face the consequences.”

These aren’t just idle threats, either.

Stephen Parkinson, the director of public prosecutions of England and Wales, warned that there are “dedicated police officers” tasked with “scouring social media” to “follow up with identification [and] arrests” when people “publish or distribute material which is insulting or abusive which is intended to or likely to start racial hatred.”