Comment 19 for bug 6671

Blender needs to be able to access rendered image sequences so it can play them back. random names could work, but only while blender was running. people often work on an animation over many days/weeks, so only allowing them to play their animation during a single session is not good.

basically if bob isnt sure who's tempering with his temp directory, he should not render to it. or give people read only access to his home dir.

I think removing symlinks is a reasonable solution to this. rendering to /tmp is a bit weak, so failing that, we could define a render dir for blender to use, perhaps in their home directory.