MadMike,
The fact that the system will place you in AFK mode doesn't mean that the system kicks you out of your company... You will STAY IN your company, even though you are AFK.
The only possibility would be a disconnect from the server which could screw up your plans to leave your computer on, however, this doesn't happen very often if you are using a WIRED connection (so not wireless).
You can see the reset info when you type !resetinfo in-game, which is currently on server 2:
Automatic reset: passworded: 72 month(s); not passworded: 12 month(s); no vehicles: 1 month(s)
The reason why we do this is to keep the server healthy... If there are like 1200 trains (usually more in the end of the game) devided over 5 companies active in the game (and all the other vehicles offcourse), I think you can imagine what that does to the server load? then we are running 9 server instances of OpenTTD on our current server, so we have to build in something to prevent to much CPU load.
Hope this answers anyones questions
Frank
Server Admin