Bug - Fouling

I'm again unconvinced whether tis is a feature or a bug, so thought I'd throw it out there.
In the rulebook I can find no mention of fouling. As such, it must obey the standard BB rules.
However, I am aware that there is no ref in DB.
In my first game I performed a foul and was immediately ejected by the referee, no roll. Is this right, and is it how it should be handled? I was lucky enough to KO a blodger with a lineman, so it was worth it for me, but if fouls are automatic sending-off their value decreases drastically.
Can this be clarified please?
In the rulebook I can find no mention of fouling. As such, it must obey the standard BB rules.
However, I am aware that there is no ref in DB.
In my first game I performed a foul and was immediately ejected by the referee, no roll. Is this right, and is it how it should be handled? I was lucky enough to KO a blodger with a lineman, so it was worth it for me, but if fouls are automatic sending-off their value decreases drastically.
Can this be clarified please?