I don't know about their DHC-8 but ours had a mechanical gate you have to get past by pulling some triggers before props go into ground pitch. In case you feel there need to go beyond that gate there are no fewer than three large and prominent placards warning of the horrible things that will happen if you should enter beta whilst in flight.
No amount of safeties can stop an unprofessional pilot at the controls from doing something stupid.
I think it's funny that the SHT would recommend Bombardier introduce measures to prevent Wideroe's idiot pilots from acting like idiots and exceeding the aircraft's capabilities.