Worrying about my heat signature is altogether different from knowing “what is out there and how to counter it,” as namelus said. I personally chose to invest in a FLIR device so, particularly in widespread power-out circumstances, I can see what is, in fact, “out there.” I chose the FLIR so there’s no active IR “red dot” for bad guys to aim at. Most of them will not have any night vision capability, and if they do, they’ll probably be far better equipped in other ways as well, and I can only do as much as I can do. But I don’t regret having the FLIR so *I* can see what’s going bump in the night, without being seen as a glowing red dot that emanates from most IR night vision devices (at least the ones I can afford). Seems only prudent to me.