I am not sure that I understood your question.
If you wanted to ask whether you can ban troublemakers or not, of course you can.
And also if you stream with PBBans the cheaters will get automatically added on MBi and banned from your server.
These two kinds of bans are separate and your troublemakers banned will not be added on MBi, obviously.
Unfortunately you need to be a Streaming Game Admin in order to send possible hack related demos, or screenshots.
As {RUF} Ice Man said, get your servers streaming on PBBans, then get another demo of him (or even better, get him caught by PBBans' exclusive checks) and submit it ;)