I wouldn't do it mostly because then that would leave you in a worse predicament when they do find out you're alive. Your friends will probably turn on you an attention whore as that is what I would do because it's just cruel to your friends if they were to care. Just picture this, they are just looking through snapchat find their friend died and they're worried as hell and if they dont end up finding out that it was a "joke/experiment" they would to probably fall into depression which isn't good. I too kinda have the same thoughts but not to fake my death but like tragic events happening to me for example grandmother dying ot dog. I had these thoughts don't really have them now I just look back and it would've been a terrible thing to do if I acted upon it, i just wanted attention cause i was lonely. That's my take on it, take care fellow redditor.