They can be used to explode bombs.What I've heard is that prepaids are good for anybody worried about wiretaps. By the time somebody get's a warrant to tap you you're done with the phone and you can toss it. You can also switch phones easily making yourself harder to trace.
Pre-paids are also good for people who can’t afford otherwise.
Hmm, you’re right.
Both right. Use once or for a short time and it can’t be traced, then used to detonate a bomb.