Yes, I found the same, but it does not help in removing them from my 00_IMPORT layer. Even by adding an exception for items on that layer, they still end up there.
I want to be able to isolate parts of my imported geometry (planes or curves, for example) without having the screen cluttered with quilts that block my view.
The only thing that has worked so far is manually excluding the items that I don't want. Click the exclude button on your first image and then select everything but the copy geom. This works and things tend to stick, but it seems that new stuff ends up in there on a regular basis, sometimes because I've redefined the copy geom, sometimes just because I regen'ed the assy.
I'd really like an automatic way of excluding those items.