Does this MOD exist?

[Lay]

Idk how to explain it on english, im german. But ill try it so dont flame me cause of my english
Anyways, i want to know if theres a mod like You have to view a thread before you can continue browsing on forum etc..
I saw that on some forums, but idk what it is called :/ Would be nice to know, thanks.

[Bugo]

http://custom.simplemachines.org/mods/index.php?mod=1364