It's big Brother, that's all. I'm against it, personally, nor can I see any real effective use being made of tapping internet connections.
On the subject of invasion of privacy, it is, regardless of how one looks at it. It doesn't matter if the subject cares or not, it doesn't change the fact. Not only that, but criminal activity on the internet is essentially, these days, being considered anything that can be downloaded, meaning that everyone would be tapped, not just a few people
