Did I read any pro-Brexit arguments? Hmm. I read a fair amount of fairly wonkish economic arguments--as with trade barriers, however, it seems that most professional policy experts (and most economists) are generally pro-free-trade and don't have much to say on this being good policy.
Again, maybe my perception is a bit off, but I see this as similar to climate change arguments: the science (especially when it comes to macroeconomics) is imperfect, but if you restrict yourself to those with some academic qualifications, you see a very different picture than if you read political opinion.
You could've gone to /r/the_donald. Beside the memes, there were many threads for each podesta email-leak, linking specific comments/sentences for deplorable dnc doings.
But you instead went to cnn, where it is illegal to think for yourself. ( https://www.youtube.com/watch?v=7DcATG9Qy_A )
Now, it will be the Hillary supporters that need to create new accounts to defend her.
Knock it off.
Knock it off.
I don't watch CNN. Not a big fan of TV news.
So it's the traditional filter bubble, not the social media bubble.