graeme_p - 7:09 am on Sep 13, 2012 (gmt 0)
Nothing can prevent human stupidity!
I read email as plain text by default, and my mail client warns of links that do not match the link text, and I hover look at the url (in the rare cases when I click on a link in email).
This thread prompted me to turn on ufw (firewall) and enforce the Apparmour profiles for Firefox (it is unenforced by default), Chromium, and Avahi.
As for social links, even there the risk is lower: WIndows remains the main target, and every thing other than a .desktop file will not run unless marked - and I have never heard of that hole being exploited.
I wonder if there is a way to scan .desktop files just in case?