OT: My stupid iPhone

Been meaning to ask this question for a while, because a quick search of Google didn't seem to turn up any big known issues. My iPhone sets off anti-theft detectors in many stores (Best Buy, Wal Mart, Kroger, etc.) to the point that I often warn them as I'm walking in the door that it might happen, and I sometimes hold my phone back into the detector to demonstrate it. It's obnoxious!
It's a standard ol' school iPhone (no 3G, 3Gs, etc.) with WiFi DISABLED most of the time, but BlueTooth is ENABLED. Doesn't seem to matter if I'm on a call, though, and it happened twice yesterday with my BlueTooth headset turned off (but BT was still enabled on the phone). If it makes any difference, placing the phone too close to my wireless keyboard and mouse (NOT BlueTooth) disrupts the mouse signal, and I also haven't seen that happen with anyone else's phone.
Any else seen anything else like this or have this problem? Thanks in advance.

It's a standard ol' school iPhone (no 3G, 3Gs, etc.) with WiFi DISABLED most of the time, but BlueTooth is ENABLED. Doesn't seem to matter if I'm on a call, though, and it happened twice yesterday with my BlueTooth headset turned off (but BT was still enabled on the phone). If it makes any difference, placing the phone too close to my wireless keyboard and mouse (NOT BlueTooth) disrupts the mouse signal, and I also haven't seen that happen with anyone else's phone.
Any else seen anything else like this or have this problem? Thanks in advance.
