[Az-Geocaching] income taxes

Was going over thing to deduct on my taxes last nite and found a place to
deduct hobbie. I am woundering if anyone else out there has thought or done
Geocaching as a hobbie on there taxes. I figure with exchange items, stuff
for new caches, GPS units, boots, internet, and all the other stuff you need
to play. It comes in to a pretty nice chunck of change. Anyone else have any
thought on the matter?