Hide the spare FOB on the bike
Put the battery in it upside down so its not working
(Someone could knock off your bike)
When you need it , dig it out and reverse the battery
Lots of places to hide them if you think about it
Under the seat does not do it for me, in fact Harley seats in general must be the easiest things to steal in the world. One simple screw and bingo! your seat has gone.
In fact the more you think about it the more the FOB does seem like a bad design flaw in some ways.
Don't know about you blokes but even armed with my fob if I am in an unsavoury neighbourhood I will usually lock my ignition switch and lock the steering lock......WITH THE KEY.
Q. Why cant they miniaturise the fob into the actual plastic bit of the key and make the fob and key THE ONE UNIT?.
A. That is just as stupid beacuse then you will lose the key with built in fob (if perchance it falls out of the pocket).
Maybe a fingerprint touch on the speedo? Voice recognition? etc to enable your bike so you can ride it is the way of the future.
obviously most here are old school... most new cars are also keyless simple solution is to place the key/fob in your pocket, same as you would with your car