[ic] Forum Tag - How to Hide Top Level Posts?

[IC]

Hi folks,

I am trying to hide top level forum posts where the score is set to -1 in
the table, I am using:-

[forum top="[item-code]" display_page="forum/display" scrub_score="-1"  /]

But messages at the top level are still displayed, only reply messages get
hidden.

I am trying to moderate the spam that comes in by setting everything to a
score of -1 and then increasing the score for genuine posts, how can I do it
for top level posts?

Thanks,
Andy.