+1 | As a member of KPD, and former SLT, criminal records are rarely ever given out. KPD and the school do NOT communicate much, so the school knowing the criminal records of 300+ students (many people have more than 1 character, many who may have criminal records) is absurd. I haven't seen or heard of them running background checks on people participating in sports. It makes sense to do a background check on people joining a working faction, but students trying out for a team is pretty far, considering how many students and teams there are, and SLT rarely watches the tryouts to know who's participating.
If you have a felony upon trying out, you should be allowed on, which is what Eco is suggesting. If you COMMIT the crime afterwards, you are subject to removal, and I would push for a blacklist on sports (On said character), though that may be a bit difficult to keep up with and note down.
Give people a chance to use a character they are attached to and will be more active on, than force them to make a new character just to play a sport.