They should modify it, so you can report one person per battleground.
And if the person is booted, then you can report another.
But if they participate and are not AFK leaches, then you cannot report others this BG.

Or limit it so you can do a maximum of 5 reports or some such.
But if you do more then that, you yourself are auto ejected.
With the message like, "You're reporting others and not contributing, enjoy your deserter debuff".

We can wish...