I use this module to allow easily offended users to hide controversial pictures.

$output = t('<div class="ignore-user-container">!username is on your <a href="!ignore_list">ignore list</a>. Click <a href="!comment" class="ignore-user-content-link">here</a> to view this post.', array('!username' => theme('username', $authors[$comment->uid]), '!ignore_list' => url('ignore_user/list'), '!comment' => url('node/'. $comment->nid .'#comment-'. $comment->cid)));
$output .= '<div class="ignore-user-content">'. $comment->comment .'</div></div>';
$comment->comment = $output;
        
//Ignore user picture also
$comment->picture = '';