There's a reason why basically no community has implemented a system like this. Many of us experience various incidents, whilst playing the server; game crashing, internet connection problems, accidentally exiting the server, and etc. We cannot punish players for something they were not personally responsible for. Besides this, I am confident that a feature like this would discourage newcomers to continue playing. If I re-joined a server and saw them smacking me 2-5 minute ban, I would probably just forget about the server. Not to mention the fact that players who do indeed re-join the server before the 5 minute mark, many of them don't really benefit from it, as they end up in the same team and sometimes the round still hasn't finished yet. There's also the possibility to just bypass the system. The best way to approach this would be to have the system issue a warning to the player before the actual consequences, instead of immediately banning them the first time. Supervisors and Admins exist for a reason, to apprehend these offenders. If we really wanted to, we could make so most of the offenses are controlled and dealt with by the server, but then the point of Supervisors and Admins is lost. So from a wider point of view, this feature would not only be unnecessary but it would also affect the player base the community has built so far.
