Looks like this is a hot topic of discussion.
Here's some of what I picked up from this thread (and what I could easily do):
- Add an AFK-autokick-timer for training rooms that kicks you after 5 or 10 minutes of complete inactivity (like we already have for all other modes)
- Remove the 'infinite' time and round option for other modes than Training
- Cap the max player room size for other modes than Training
