Spammers, hackers, political propagandists, and other nefarious users have always tried to game the systems that social media sites put in place to protect their platforms. It’s a never-ending battle; as companies like Twitter and Facebook become more sophisticated, so do the trolls. And so last week, after Facebook shared new details about a tool it built to analyze text found in images like memes, some people began brainstorming how to thwart it.

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