If you set everything in your list to either listen/record or not listen/ not record, those tg's will do what they are told. Any new tg's that are not in the aias list will play.
If you set the tg range from 1-65535, (which is the lowest and highest possible tg) it will treat any tg that is not in your alias list to follow the setting you choose. So if you do not wish to hear anything other than what's in your list, and listen and record are set to off, you will not hear them.
I have a nice list and set it up range on mine to both listen and record. I rarely listen live but do record everything and play back when wanted thru trunking recorder. I select the tg's of interest and let them play the recorded calls thru the browser. So if I wanted to see any and all tg's that were on the system that were not in my list, I select the tg range (named unknown) in trunking recorder and it will play all those back sequentially. Good for trying to id new tg's from recordings.