SMA PLT INADVERTENTLY PENETRATES TEMPORARY RESTR AIRSPACE AROUND A PWR PLANT.

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TOOK OFF FOR A LOCAL FLT WITH THE INTENT OF SHOOTING SOME TOUCH AND GOS AND SOME VOR PRACTICE AT ZZZ1 BASE. AT THAT TIME AND DURING THE EVENT THE SKY WAS CLOUDLESS AND VISIBILITY WAS UNLIMITED. THEREFORE; I DIDN'T RECEIVE A WX BRIEFING OR CHECK NOTAM (FAR -91.103). I HAD RECEIVED A BRIEFING A FEW WEEKS EARLIER WHICH HAD INDICATED THE END OF TEMPORARY RESTR AIRSPACE FOR OUR AREA. ONCE AIRBORNE I DECIDED PRACTICE NAVIGATING WITH MY HANDHELD GPS TO ZZZ2 ARPT ABOUT 50 MILES AWAY. ABOUT HALFWAY THERE I TUNED INTO ZZZ APCH TO MAKE SURE I WASN'T CREATING A CONFLICT. ATC WAS HANDLING A FEW ARRIVAL AND DEPS; BUT NO MENTION OF ANY RESTRED AIRSPACE. AT 3000 FT MSL AND SQUAWKING 1200 I PASSED ZZZ2 ARPT; I DECIDE TO FLY 10 MILES FURTHER TO OVERFLY MY MOTHER-IN-LAW'S FARM JUST E OF CTR POINT AND THEN RETURN TO ZZZ1 VOR. IT IS AT THIS POINT THAT ZZZ APCH REQUESTS CONTACT WITH UNIDENTIFIED ACFT 18 NM N. I RESPONDED AND WAS GIVEN VECTOR 270 BACK WEST WITH THE INFORMATION HAVING BUSTED RESTR AIRSPACE. I HAD TO ASK WHAT COULD POSSIBLY NEED RESTR FOR I COULD SEE NOTHING BUT OPEN FARM LAND (EXCEPT PWR PLANT; SEVERAL MILES S). I COMPLIED WITH ATC INSTRUCTIONS AND RETURNED DIRECT TO ZZZ1 ARPT EXPECTING TO BE RECEIVED BY FOLKS IN BLACK SEDANS WITH LONG ANTENNA. I BELIEVE THAT EVERYTHING I DID DURING THE FLT WAS SAFE AND NON THREATENING TO ANOTHER HUMAN BEING. I AM TOTALLY SENSITIVE TO THE FEARS OF THE GENERAL PUBLIC ABOUT AIRPLANES AND HAVE ATTEMPTED TO ACT IN A WAY WITH THE LEAST IMPACT. I AM NOW KEENLY AWARE OF THE NEED TO REFERENCE NOTAMS. I HAVE TO ADMIT BEING SLOW GETTING UP TO SPEED FOR THE POST 9/TUE/01 PROTOCOLS. I HAVE A QUESTION ABOUT NATIONAL SECURITY: IF I AM UNKNOWINGLY MAKING A GPS STRAIGHT LINE FLT DIRECTLY TOWARD TFR WHILE MONITORING THE CTLING FREQ WITH TRANSPONDER RPTING AND DON'T GET A WARNING (AS FAR AS I KNOW) YET ONCE IN THE AIRSPACE COMMUNICATION IS INSTANT; WHO IS BEING PROTECTED?