Personally, on bombing missions I usually hit what may count concerning tatics. Hitting radar has it's purpose, that goes without saying. Porking radar might be a good learning "tool" in the "do's and don't's" and at the same time not really accomplishing anything for your side. When I first started playing, I porked radar alot with bombers. Then I began to realize that hitting VH or pot-holing airstrips, or killing fighter hangers on bases that are being used against my side is alot more fun.
By taking out VH or FH on neighboring enemy bases that are using it as their base of operations to capture one our bases does help your side. Taking out the radar first doesn't really help too much in that regard, but take out their VH capacity or fighters or go nose first killing their ack does. I am not saying killing radar isn't necessary, just not a high priority for me. Gotta hit 'em where it hurts. Flying a 30 minute mission across the map with B24's or B17's to hit radar or even hangers on bases that are idle just seems unfun to me and boring.
If others like hitting radar to knock them out on the front line, then it is OK by me. If others don't approve, that's OK too. Whatever floats one boat.