a few apply to me, but here are some originals
when you drive your 1/1 like an RC
when you break out
at least once a night on something stupid(RC related) someone says at the track.
people buy what you buy, not what won the last race, because they know that you've done hours of research on it
you want to paint your 1/1 like your RC
you have a netbook with loaded with a manual/partslist/exploded view for just about every RC made
you've never owen a GTB but everyone at the track has you program their's for them...(50% throttle of course
)
you've bought/sold 20+ RCs within the past 2 years trying to find something you like