Yes, the LARGE reflector (LightForce) type lamps when attached atop of one's scope CAN be a bit of a sail, BUT if that is a problem then one is ALSO shooting in a breeze/wind that will severely limit one's shooting range. Have used my RSM170 (scope attached) in stiffish breezes, certainly in the 10->15 mph strength, and been OK without being bothered at all by that sail property, and have missed some longer ranging shots just cos of that stiff(ish) breeze yet the rifle over bi-sticks wasn't moving any more than it usually does in my old (but VERY competant) hands!!.. Ha!
So that excuse is a non-starter imho guys!
ATB .... and shoot safely