[ericgtr]

Here is one way, keep in mind you will have to add only the forums you want to exclude, so every forumid do that you put in the array will show avatars and sigs, all others will not.

In your postbit (or postbit_legacy) find:

<if condition="$show['avatar']">

Replace with:

<if condition="$show['avatar'] AND in_array($thread[forumid], array(xx,xx,xx))">

Now, in the same file we can do this for the signature as well. Find:

<if condition="$post['signature']">

Replace with:

<if condition="$post['signature'] AND in_array($thread[forumid], array(xx,xx,xx))">