I think we'll be just fine. Nothing can mess with Faimba.
Yeah, cellular networks will no doubt be bogged down by people making way too many calls. But it will be just another normal(ish) day for Internet because we got the bandwidth. BTW we didn't get fiber until 2009
I think there's a better way (bots) to screen online chatter than directing all traffic through a single tunnel. Anyways, it's not that easy to monitor the internet like that because it's not like you're sieving tea to get out the leaves (bad tweets.) Most social networks USE https: connections which are encrypted hence you can only see bad posts AFTER they are posted (made public.) Intercepting that traffic is virtually impossible. That's why governments tell owners of the sites (Twitter, Facebook etc) to crack down on hate speech because they are the ones that can get to the rotten posts before they're made public.