Electronic Arts has quietly changed its policy on suspended accounts. Prior to the changes if you had a suspended Origin and related forum account for saying or doing naughty or disagreeable things, the company would ban your account and make your owned games unplayable - even in single player mode.
Here is the new policy as of April 8, 2011:
"With every game and service EA offers, we take the satisfaction of our customers very seriously. We discourage cheating and strive to maintain a high level of integrity in both our games and our forums. To this end, we will hide inappropriate content, and we will take action on EA/Origin accounts that violate the Terms of Service (TOS) based on the severity of the offense.
If you find yourself with a disabled account, please note that you can still play EA games in single-player mode. For PC games you will need to enable Origin's offline mode to play games with a disabled account. Go to the settings tab in Origin (the gear icon) and select Go Offline.
If your account has been disabled, please follow the instructions in this article if you wish to appeal the action.
Please note: The majority of banned or suspended accounts are only suspended temporarily. Find more information about the length of your suspension by checking the email address associated with your account."
Thanks to the fine folks at Reclaim Your Game for the tip.