Comment 2 for bug 63360

It's a terrible design decision. Making saring easy is good, sharing by default is not. Please also see #67128 for arguments, why this design decision needs to be changed (most notably: it violated "security by default" principle).

I don't want to start a fight here, because it's easy for me to chmod 0700 for desired behaviour. But novice users may be unaware that their home directories are shared by default. This can cause serious leaks of sensible data (including passwords, or bank account info) which users have put in their home directories. I strongly believe that sharing should require explicit action (perhaps with a check box in some GUI configuration program), which indeed makes things a bit more complex, but not necessarily too complex for novice users.

In any case, making sharing explicit (and therefore more difficult) is better than allowing possibility of catastrophic private data leaks.