TCWH (venting. so venting, I'm almost spitting.): And so what do they do? They fucking tackle each other! How many fucking times have I said, "NO TACKLING, BOYS and GIRLS!" and they say, "OKAY, MRS. TCWH!" and then they knock the shit out of each other! I need a cattle prod out there!

Dh (so commonsensically): Why don't you just get a bull whip?
TCWH: really?
Dh: Yeah. Longer reach. Less running for you.
TCWH: ::SWOON::
Bullwhip! Yeah! And you wouldn't have to hit them and then get in trouble for corporal punishment, you could just snap it in their general direction. How much fun would THAT be?
I gave a pop quiz to my hateful students today. Now, I'm sure, they hate me even more. Oh well. Too bad!
If the boys are tackling the girls, I'd suggest you tell the boys that all girls have the cooties, and if they don't want to catch the cooties, they shouldn't tackle them. Or visa versa.
Reverse psychology would probably work, but then one of the kids would tell their parents what you really said and then you'd probably get sued.