4chan influences society in more ways than people would like to realize.
CNN reported that Sam Hyde was the shooter of the latest Texas shooting.
A world wide campaign of "It's okay to be white" posters have been posted in all corners of the globe (well, atleast in white countries) because of 4chan.
All other image boards, social media, and internet savvy people depend on 4chan to create new memes.
4chan influences the masses, even if people would like to believe otherwise.