As most of you already know, the report system is slightly broken.
Firstly, sometimes the server automatically reports people who are playing (I have yet to figure out at what specific times this happens). This is obviously a problem in itself - as most times you get kicked once a sub has joined. Which is slightly unfair when its not the players fault.
And other times the original player wont get kicked. Sub obviously gets frustrated and angry as he/she does not realise that the system has incorrectly reported a person. With luck the sub will understand he is not needed so leaves.
This is when the problem starts - the sub leaves, he gets reported by the system (even if the sub was never needed in the first place and there is no requirements for a new sub) which leads to a new sub joining the server. Again - this sub gets angry and abusive to all the other players as this person does not comprehend that this is a system error. This sub then leaves too, which means ...
Yes you guessed it - the sub gets reported and a new persons joins again.
I was in a lobby the other day and this happened 4 times.
This is a very common problem which causes frustration amongst lot of players.
Hopefully will be fixed at some point in the near future