@a_5mith How about a global widget that asks everyone to register?
I'm also suggesting a widget.
Maybe a widget-plugin that adds a template to hide until a specific amount of topics got visited and to provide the amount for the widget-contents (taking care of uniqueness).
You've already read 16 different topics. Wouldn't you mind to register?
Maybe just a guest-statistics plugin that collects (and provides to templates) some information like that for each single guest.
@julian we need more security https://jsfiddle.net/egyxzh0t/1/
nodebb-plugin-quora
@julian That is horrible and I wish people would stop doing it!
Easy to bypass though 
Cookies with a redirect.
If the user can't be bothered to register, then they probably can't be bothered to clear their cookies.
protip
How about a giant sidebar ad with a message that says "Sign in to remove this ad, registration is free!"
Anon users rack in some extra $ and more people end up signing up. Win-win
Not a fan of ads. Adblock being popular and all that. 
What if its a giant "I 
NodeBB" banner then?
Edit fiddle - JSFiddle - Code Playground
