In game, go to console and type "status". Once you post your STEAMID here, we'll be able to find out what happened.
I did ban an individual who had names that implied discrimination/racism. Ghandi or Ghgandinumberone was not the individual I banned though. The guy I did ban I kicked twice, and they kept coming back with a different name. So if that is you or one of your sons, there is a reason you are banned. If not, then I don't know what happened and you may have to ask voogru or the other admins.