Never heard of Couchsurfing and I'm quite shocked this idea was able to captivate a considerable amount of people. It all seems terrible to me. Invite a bunch of strangers to hang out in your house? What a terrible idea! Sure, not all people are morons or psychos but there are such people out there. And only one is all it takes to end or completely ruin your life. Risk a life to be able to hear a bunch of bullshit what some idiot has to say is totally not worth it imo. If you want to talk to an idiot - you can find plenty of them on Facebook or Twitter. At least it's safe. And for the real life communications just hang out with your family, classmates, coworkers or even neighbors. There are a thousand people that you know and have some sort of relation to. If you wanna date - use tinder or something. Be careful out there, if not for yourself but for those, who love you and care for you!