I thought that there was already I way to find out who upvoted who. If you have a different way, than that is good! Variety of methods is good! Hey, alanzheng , please tell me if THIS will be easy... I think it can be done. Here is the idea, your opinion, please! https://steemit.com/public/@yesiknow/public-local-area-network-through-wi-fi-routers