Real.com scares me to death. I found a video I wanted to watch, but it was in some arcane RealMedia format.
I wanted to watch it even with the crazy format it was in, so I created a non-admin user to install the program in.
After doing this, I found that the non-admin user had write access to a whole bunch of my files and also a whole bunch of system files. This scared me a bunch, so I decided to hack something together to trawl the filesystem and tell me which files were essentially world-writable.
First you will need to create a non-admin user.
On a mac, you can do this in System Preferences / Accounts.
./setup USERNAME to get the repo up and running.
./run and follow the instructions.