Anonymous communications are basically off the radar.
Depends on whose radar you're talking about. The laws aimed at hunting down terrorists, and the laws aimed at hunting down pirates, are being pushed by different people, but they are converging rather rapidly.
Being a U.S. Citizen noncombatant detained without charge?
Is it ok to detain non-US citizens without charge ?
Yes, but do you think they'd go for the little guy - you? No. They'd get a warrant, spy on you to get the big guys wherever.
I'm not ok with being spied on just because someone wants to get some "big guy" somewhere. And, as I said before, it's virtually a certainty that I'm doing something illegal, without even realizing it. I don't feel any safer knowing that they are "not aiming at me specifically", because I don't want to get hit, period.
A little bit. If you're innocent, then an investigation is a big hassle, but it's way less severe than permanent incarceration or death.
You say this as though our only possible choices are "an investigation which is a big hassle" and "incarceration or death".
Referring, of course, to the proposed U.S. legislation which could cause severe damage to the Internet—at least, that's what a lot of people are saying. See, e.g., this Open Letter From Internet Engineers to the U.S. Congress (the first signatory listed is Vint Cerf). On Wikipedia, people including Jimbo Wales are discussing strategies as extreme as blanking the entire site (except for an explanatory message) to get people's attention, and thereby perhaps incite them to action, such as calling their Congressional representative.
I just happened to find out about all this a few hours ago, being someone who tries to avoid distractions like most kinds of news, so possibly others here with similar habits will appreciate having it called to ther attention. Or possibly they won't. But to those of you who possess relevant kinds of expertise:
(I think this subject can be discussed without political advocacy, in which I am mostly not at all interested anyway. It just looks like a practical problem to me.)
Edited to Add: I forgot to include a fourth bullet point:
It seems to have been assumed by many commenters, nevertheless.