Startup Idea : anonymous action hashtag app

I want to make app that make people to do action.to make an action for themselves or for the others. Nowadays we see more slacktivism,to vote or hashtag.but they will not doing more far.i want to make app that can engaged people to do action,it s like ifwerantheworld.com I want to make app which people can share their idea to contact list or facebook friend. Its like secret app.why we need to be anonymous?because people and government can judge what we champaign.so,it' safe for us to whatever we post.