Writable Directories

Hello,

Writable Directories (within Joomla) seems like a potential security problem with Jooma - what are your thoughts?

Installation Instructions include: Directory write access

Mobile Joomla! requires following directories to have write access on your PHP hosting.

/administrator/components
/components
/modules
/plugins
/plugins/system
/templates

This directories should be writable to install MobileJoomla, it's standard Joomla requirements to install extensions (actually, Joomla requires ./tmp and ./cache too).