Why does the graphic portray police as mean angry people. Police are good people who provide a valuable service. They do a good thing. They are not the enemy.
All "mean angry faces" represent someone you don't intend/require/expect to see your data. I don't want the police to read my data.
No, they don't, they do a bad thing. In actual fact, all cops are bastards. Their primary function in society is to defend the property rights of the capitalist class against the working class, thus preserving inequality.
Ignoring for a moment the validity of this statement, can I ask why you visit a site that is primarily about business news/Silicon Valley Hacker errata if you're not a fan of the 'bourgeois'?
Maybe he sees dampening the echo chamber as a sort of community service.
Hacker News features many programming and technology related articles as well.
Because it's Hacker News, not Bourgeois News. And I know this site is tied to an ideology that reimagines the "DIY" (for want of a better term) aspect of the hacker tradition as a kind of pro-capitalist (or at least "DIY capitalist") thing, but I don't think most hackers are capitalists, even on this site. For me, anti-authoritarianism has always been a central tenet of the hacker tradition, which for me goes hand-in-hand with anti-capitalism. I acknowledge that most hackers are not explicitly/consciously anti-capitalist.
I usually don't see blatant communist / class warfare trolling, at least on HN.