[KJS]

I think you should just check if they do anything on rc for the last 20 mins...

(I mean anything or most of the things you do on rc sends data to the server)...

like if you load players attributes it sends data to the server to get the information about the player and what player.
if you chat in the rc.
pm someone.
admin message.
serverflags..

just as long as your doing something in rc...

so just basically you can check if the server got data from the ip that they are on (for the rc account)... and if they haven't in 20 min's then it should disconnect...