Actual harming or outright deadly Memes, arguably from /b/, are not exactly new, but this is a pretty clear example of the state of Memetics these days: This "Bernie Sanders Glowsticks" Meme Was Made by Someone Who Wants to Kill You. Sick.
A short infographic pulled straight from the Anarchist Cookbook called "How to make Bernie Sander's Glowsticks!" [sic] found its way to Tumblr, DeviantArt and Reddit in the past 48 hours. Ostensibly, it's a guide to making small, blue glow sticks. It's even stamped with a fake "Bernie Sanders approves!" message at the bottom.
These instructions do not tell you how to make glow sticks. These are instructions for how to make a deadly chlorine bomb.
[update] Snopes traced it back to /pol/. Because ofcourse.