BuddyPress.org

Hi, I am using s2member and would like to remove the activity post form from the sitewide activity page using s2member conditionals.

I am unsure what the best way to go about this would be.
I have looked at activity/post-form and /bp-acti….template but im unsure where to add the if statement!

I am removing the bp activity tab (and another one) using:

<?php
function uf_remove_nav_item() {

   if( current_user_cannot("access_s2member_level2") )
       bp_core_remove_nav_item('activity');
   if( current_user_cannot("access_s2member_level2") )
       bp_core_remove_nav_item('listings');
}
add_action( 'wp', 'uf_remove_nav_item' );
?>

Any advice would be great,
Thanks,
UF