Unless if its applied to another filter. I created "test filter 1" and "test filter 2". I included test filter 1 in 2 and then tried to delete "test filter 1" and it didnt say anything about it being refrenced anywhere else.
Since the filter membershiop is auto updating every 5 minutes (which matches my resource membership update schedule) it tells me that its either applied into another filter, target or policy somewhere. Now that I've built 3 SMP boxes I'm going back and fine tuning the filters on the first box.
Somehow there has got to be a way to see where my filter is being used but I cant find it.