Have you ever seen the site owner post? Or any post from an Admin, or really anything other then a mod?
This site is basically run by skynet. **** you here's ads.
Its 2015 though and you have choices... I don't even get ads on my mobile devices. Site owners get to choose how aggressive they are with ads and users get to chose how aggressive they are with blocking them. On chrome and firefox ******* plus works amazing, you would never even know there were ads.
The only legit answer to this is "I'm on a work computer"
Even then,
http://portableapps.com/apps/internet/google_chrome_portable
http://portableapps.com/apps/internet/firefox_portable
Those two run off flashdrives and should support ad ons. At my old job i just downloaded chrome portable onto a folder on the desktop, where you usually have write privileges.