This is exactly right. Why would we want to make it harder for us to watch them? Its much easier to monitor the Internet than sort through sail mail, monitor cellphones, or catch a messenger. I would hope that all the ideas you stated are already being implemented? One argument people make is that they can recruit via the Internet and motivate people through images of attacks on US personal. While this may be true, at the same time, we can monitor who visits these sites and geographically analyze the major nodes and networks of the regular visitors. GIS would be a great tool for this type of analysis. I'm pretty sure our intelligence people must be doing this already. Anyway, good post.
One more thing, and this might sound a little too "sci-fi" or crazy but here goes. Someone should develop the technology that would enable us to send some sort of "shock" through the system or even something that could cause an explosion at the enemy's computer[s]. A known enemy, would think he was visiting a "friendly" site and when he clicked on to the site, he would feel something very unpleasant. This may be impossible, as I know very little about computer networks or computer technology, but I thought I'd mention it anyway?
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