The idea to make it restricted to only hand-picked players- bad, bad, bad. You'll essentially be creating a class of select players who have all the power of NPC's wrapped around their finger. If it's good for the goose, it's good for the gander. Besides, those characters can't be online all the time, so it would not really address the original problem- of smugglers docking on supposedly "locked" bases.
At most, restrict the /attack to Guards.
What definitely needs to happen if this idea is implemented to avoid abuse, though, is a significant interval between uses of the command.
A good half hour to an hour in between /attacks would ensure that the command is not taken lightly, and that it is used only when absolutely necessary.
Besides, the Manhattan authorities would probably not appreciate having their sole docking ring/mooring fixture closed down every five minutes.