Default [Q] Can NFC tags be used to toggle Google Now?

This, of course, is not specific to our devices. Just curious if anyone else in the community has discovered a way of doing this. Beyond app-control (closing apps not in use, so they aren't staying in memory), I know Google services, most notably having "Now" enabled, are HOGS beyond all purpose and reason. I used to leave it off most of the time, but that temptation to have that everything-at-my-fingertips feeling tends to get the best of me. I now carry around a spare battery and switch halfway through my day at work. Yes, that's after about 5 hours of use. Sad, but true. But I digress...