Mint 13, as is common in the Ubuntu world, includes a framework for spyware called zeitgeist. In the past it was challenging to remove since apt would then try to remove the entire gnome environment. So my reaction was to disable it to the extent possible, but it's still dangerous to have this stuff on the system. However, on a Mint 13/Mate system dumping zeitgeist is easy:
sudo apt-get remove zeitgeist zeitgeist-core zeitgeist-datahub
This is a followup to Nice Little Improvement in Linux Mint 13.