Nope. It's no different than your employer having an Internet filter at work to prevent you from engaging in activities that are unproductive or expose them to liability. You can still do whatever you want on your own computer and your own time.
Right. As long as they use that judgement to avoid reading classified information. ;-)
> Army is taking proactive steps
As far as I understand (and please note that I'm not an expert) they have always blocked certain kinds of sites. That Guardian is added is not really surprising, but the indirect refusal to own up to it is whacky.