I'm often using, on unix servers I'm working with, the /tmp folder as a folder where I write temporal stuff needed for my software (mainly web applications). It has usually 777 permissions.
I found in my local machine, which mounts OsX Maverick, that the /tmp folder does NOT have 777 permissions, but
/tmp is actually a symbolic link to /private/tmp, which has the same permissions.
My question is: is there any security reason why /tmp (or /private/tmp) should not have 777 permissions? Practical explanatory examples would be great!