>>1
It's a normal computer, there's nothing special about it, except for the raspberry picture drawn on the PCB. On this small machine you should be using i2pd instead of i2p. Do not run non-hidden services on the RPi (set up a tunnel for sshd for instance). Avoid building your website with vulnerabilities-ridden CMS.
If you're trying to do something illegal you'll be busted because your site will be offline when your modem is offline. All the proofs of your illegal activities will conveniently sit in your home.
The real question is: when they kick at your front door, how you gonna come? With your hands on your head or on the trigger of your gun?