Quote Originally Posted by NanaWiloh View Post
The following ARC Principles and Guidelines for Responsible Advertising Practices apply to all “qualifying advertising” for physical games rated by the ESRB. Furthermore, all publishers, co-publishers, licensees, and/or other third parties utilizing ESRB ratings for physical games are legally bound to comply with the guidelines. Failure to do so can result in points, corrective actions, and monetary fines.

From the ESRB themselves in short the DEVELOPER not the ESRB can catch Hell for not making sure the games content meets the rating.
Once again, online interaction is explicitly not taken into consideration when a game is issued a rating. The rating is only within the realm of the content of the game, not that of the behavior of any users.

These ratings boards do not consider any potential online interaction within the scope of their purview. Period. End of story.