Your Facebook comment could not be submitted...

Dear Facebook Team,

Please define misuse. Please provide me with a metric.  

Sometimes, when using an iPhone (which you support reasonably well), it is easier to respond via e-mail.  

So...please define misuse or abuse.

Begin forwarded message:

From: Facebook <notification+mse2aynn@facebookmail.com>
Date: January 20, 2010 5:11:00 PM EST
To: Me
Subject: Your Facebook comment could not be submitted...

You have been blocked from commenting via email because you repeatedly misused this feature. This block will last anywhere from a few hours to a few days. When you are allowed to reuse this feature, please proceed with caution. Further misuse may result in your account being permanently disabled. For further information, please visit our <a href="http://www.facebook.com/help/?page=421">FAQ page</a>.

Thanks,
The Facebook Team

Edit: Since I am getting multiple hits per day on this, I have done some testing to determine what constitutes misuse.  I have determined that more that ten e-mail responses in any one hour period will lock out this option for you.  I hope that this helps.