Rooks may not hunt the hedgerows for eggs like a crow or magpie, and I, like you dont really shoot many for that reason.
Dont be fooled by them though, I have shot loads of them coming into the laying pen, knicking pheasant eggs, and loads at this time of year, knicking the sheep nuts put out for the pregnant ewes.
It is unfortunate for me that there are not so many rookeries around me any more, as the call of the rooks, is one of those great countryside sounds, along with the wild geese, plover and curlew.