Im asking :
1.why not to join?
Because it is Facebook, company heavily backed by the system, heavily involved with privacy intrusion, datamining, user profiling and selling of collected data to unknown 3rd parties?
You obviously have no idea who you are dealing with there.
EDIT: if u personally not feeling safe on facebook , that will be another subject, as im requesting normal info. from participants that can be found on public:(facebook name, not real name, facebook profile link , the one you are redirected to when you press the name, and the bitcoin address which is public...im not requesting anything personal or any data that can be bought.)