Yes it's fair for radars to place anywhere whether it is concealed or not.

But my argument is, placing it in the road that is 3 way lane on both side (wider than c-ring) and around 10km stretch (for me, it is a highway already) has no speed limit signs...and you were caught because the speed limit is only 80....and you were driving 95.....that is NOT FAIR!!

Yeah! I was a victim of this and mind you, I stick to 80 or less in city driving.