As a general aviation pilot and modeler,I really don't like the idea of unpiloted drones in our airspace.
To me,this is just a foot in the door for government surveillance over the people of this REPUBLIC we call the USA.
Wake up folks...... 
UAVs aren't "unpiloted". And as a UAV operator AND a student pilot, Im interested in how the FAA will fix the issue of sUAS in class E with the rest of the GA traffic. The bigger stuff that fly at high altitudes wont be a big issue, and will fall under IFR pretty easily.
UAVs are far cheaper to operate and maintain than helicopters. This opens the door for smaller-budget police, fire, search and rescue, state park departments to have the capabilities of a helicopter at a fraction of the price. There is also a vast number of applications of UAS in other areas: Border protection (already in use in limited capacity), agriculture, meteorology, and so on. A friend and former Army UAVer is studying geology at Baylor, and there is allot of talk of using UAVs in geology--couldnt tell you what but that's what I hear.
As for the subject of "government surveillance over the people of this REPUBLIC we call the USA", its pretty much the same case as that as flying surveillance missions in Iraq or Afghanistan, which I have done 3 times. Imagery collection is a very lengthy and time-consuming process, which is best spent on criminally suspected targets. I'm not concerned about some random Iraqi or Afghan walking to the market or the mosque. Its impossible to watch everyone and draw any educated conclusion of who is doing "bad stuff" and who isn't. Its the same in the states. PDs wont have a whole lot of interest in John Q. Civilian tinkering on his lawnmower in his back yard. That kind of ISR is cost prohibitive. Their time will probably be mostly spent on highways: clocking speeders, snapping pictures of vehicles and license plates, and dropping speeding tickets in the mail. Or taking over in high speed chase situations...cant outrun something that flies, and would be much safer then a vehicular persuit.
Bottom line is, why worry so much about something like that? If you really want to hide from Big Brother and his flying camera, check out the Discovery Channel show "Doomsday Bunker" For around 100,000 bucks, you can build a self-sustaining, totally secure underground bunker with all of the comforts of home. If shooting it down is your answer, as some have stated on this forum before, good luck with that. Even sUAVs fly around 1,000 ft off the deck, are invisible to the naked eye and totally silent. Even if you get lucky and hit it, you are not only guilty of destroying property whether gov't or privately owned, but you are also liable for any damage that the falling debris causes, and in the event it injures or kills someone, can be charged with attempted or involuntary manslaughter. So just don't worry about it. Odds are, I will be retired from the Army by the time all of this comes to fruition, and working for one of those previously mentioned organizations. I promise, on my mothers honor, I wont take pictures of you in your underwear as you go out to get the newspaper....