It is impossible to educate everyone about the risks of the cloud. Even if it goes mainstream :( I tried with my family many times, but they never fully understand it.
For most people nowadays, "the cloud" probably doesn't have anything to do with accessing an FTP server... specifically not a public FTP server unless the cloud hosts are absolutely careless...
I remember using sites like http://ftpsearch.ntnu.no probably 15 years ago to find very interesting files on public FTP servers (but I don't think that this one exists anymore)
I remember using sites like http://ftpsearch.ntnu.no probably 15 years ago to find very interesting files on public FTP servers (but I don't think that this one exists anymore)