Slacktivism is possibly one of the most irritating things that social media has ever engendered.
"Wooooo lemme take a selfie of myself holding up a symbol or sign, or making some sort of hand gesture. Tag other people. Add hashtag(s). Don't necessarily have to actually read up and gain a nuanced understanding of what I'm campaigning for. Awyeah I've changed the world. #hashtagging4change"
So yeah. Most of the time, our slacktivist posts don't do much beyond:
i) conveniently letting the world know that we are do-gooders. #inspiring #youths #changetheworld
ii) enabling us to be humble brags. (e.g. "more people really need to know about this Massive Problem In The World!!!" - subtly implies that poster is a knowledgeable, well-read global citizen)
iii) giving us an excuse to post selfies.
That said, though, I would concede that there definitely are exceptions to my snark; some social media movements have legitimately sparked some great, actual responses to significant issues. And those are awesome. It's just the co-opting of "activist" causes for mindless, feel-good, self-promoting purposes that really get to me.