Comment 1 for bug 858875

http://code.google.com/p/modwsgi/wiki/ApplicationIssues

"Note that you should refrain from ever using directories or files which have been made writable to anyone as this could compromise security. Also be aware that if hosting multiple applications under the same web server, they will all run as the same user and so it will be possible for each to both see and modify each others files. If this is an issue, you should host the applications on different web servers running as different users or on different systems. Alternatively, any data required or updated by the application should be hosted in a database with separate accounts for each application."

This file comes from upstream, so I forwarded the bug there as well.