As for the government shutting down hams, it would be pretty much impossible unless they simply jam all frequencies. If you have the equipment to send and/or receive, you can do so (legally or not). Yes, they could come pounding on your door and confiscate your equipment, just as they could do with guns if the law allowed for it. However, if it gets to that point, I'm sure both radio operators and gun owners would resist with whatever means are at their disposal. As far as ham equipment goes, local communications are generally on the two-meter or 440 bands (with or without a repeater). In an emergency situation, long-distance communication is probably not going to be of much value except to see what's going on in other parts of the world. Your gun, and local communications are going to be your best bet to improve your chances of survival. Stock some gasoline for your generator, and plenty of ammo!