I'm a strong advocate for browsing as I use it all the time. It is so so useful. It allows you to see if the person has similar files as the one you're after & if you're downlding several, browsing can re-activate the other files into action to restart downlding.

As far as the filters go, I'm not sure how well they work. I do know the freeloader slider has been inactive for some time.

If you wish to ban someone, you can right-click them & choose Block Host. I don't know how you undo this though. In your Tools>Options>Filters>Hosts you can also manually add or remove blocks against hosts.