It is next to impossible to ban ExtraTorrents mirror and proxy sites as these sites are merely acting as a conduit between the downloader (you) and the ExtraTorrent servers. If you fail to access ExtraTorrent due to the blockage of a particular server, there is no use in bypassing through a VPN. Rather you could use one of these extratorrent mirror sites to access the site.
In case, your regional government issues notice to a particular server, other servers still work without any hassles. There is not much difference between all the aforementioned sites barring ping rate and the speed of data transmission.