Just need something like this:
Wireless RF Isolation Key Fob Security - Select Fabricators Inc
http://www.amazon.com/Keyfob-RFID-Si...dp/B00Y3FLYWG/
Security through obscurity only benefits the thieves. For all the amateurs that might want to try from sifting a forum, the defenses are far better learned. Ultimately it's all about delaying the inevitable but unless you can hire armed guards 24/7 if someone wants in they're going to get in. Most anti-theft is about detecting and/or delaying until the popo can be called or you can arm yourself...