I thought so too, but lately I have heard and read accounts akin to a lot of what happened in late WW2 with regards to radar technology was highly classified an

I thought so too, but lately I have heard and read accounts akin to a lot of what happened in late WW2 with regards to radar technology was highly classified and much didn't enter the history books. Pilots shooting and nudging definitely happened but likely other, more advanced stuff happened too. The germans had fully automatic radar controlled flak guns.