It's an international effort. The UK government has an official Nudge Unit. Plus OFCOM, their office of communications, actually has a law against publishing things that might "...broadcast material which (i) questions public policy or (ii) could undermine the advice of public health bodies or (iii) could undermine mainstream sources of information and/or (iv) which therefore could reduce trust in government or public institutions..." And let's not forget TNI, the Trusted News Initiative.