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Some Bugs Rated 4 out of 5 stars
It has some bugs. I think you may already have known this. When it blocks some sites, actually it doesn't COMPLETELY have a control of passing packets through the destinations. It still gives and takes packets even after the blocker seems to have blocked the delivery of packets.It means it could still raise hit rates of the destinations and it plays a role of security guard who has some laziness. Eventually,it blocks the delivery though. It seems to have a blocking latency here.
I hope the later version may have fixed this one.
But Anyway I respect your work. It is a just comment.