Yeah, I take your point. much as I found those e-mails amusing, they do seem to take rather a puerile delight in thumbing their nose at authority to an extent which other bit-torrent sites don't, and it could well have a knock on effect on Swedish copyright law (starting to get a bit too popular and therefore too cocksure for their own good, perhaps?)
Internet file-sharing has become such a huge phenomenon now that it can't be entirely regulated, mind. As you say, there are plenty of other torrenting networks around, and even if the Pirate Bay does get closed down I've no doubt that another site will take it's place