Plesk 12.x / Linux :: Proftpd Default Folder Change?

I am noticing that several of my users are wiping out their user root folders ( logs, error docs, etc...) when they fail to use '/httpdocs/' as the root directory when publishing with FTP.

I fixed this by editing the proftpd.conf to use ~/httpdocs/ as the DefaultRoot folder ( instead of just ~/ ).Would it be safer(better) to go through all the ftp users and make the home directory '/httpdocs/' instead of '/' in the admin UI? If yes, what is the best way to do a mass update of this setting for multiple users ( multiple domains ) ?