They have been using Facebook and Twitter to devastating effect - even hijacking people's innocent tweets to spread their message of propaganda.
And now social media users are giving ISIS a taste of its own medicine - by mounting a series of campaigns poking fun at the group.
In recent weeks, a wave of tongue-in-cheek virals ridiculing the terrorist organisation have been sweeping across the internet.
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Typical liberal response.
ReplyDeleteFight beheadings with twitter shame.
Yeah, hows that working for ya?