Is there a way to disable signatures for a group of users? I saw the option for an individual user but want to disable it for all users of a group.
U can disable signature to all by removing this code
goto template -> User Control Panel Templates -> usercp_nav_profile
and remove this code
<div><a href="usercp.php?action=editsig" class="usercp_nav_item usercp_nav_editsig">{$lang->ucp_nav_edit_sig}</a></div>
Note : It will disable signature for all members in the forum
For all users, yes. For just some groups, no, you'll need a plugin.
Labrocca has one at mybbcentral where you can set a post limit to use them...