Pros and Cons to FOB tackling?

[NEW CASTLE HiTMEN]

Great replies. The reason I asked this question is I am losing my nephews interest in the game. They want more scoring. We started playing a multi-stop rules but now I am coming up with defenses that king of prevents them from scoring on every down. They both play organized football so they know that scoring on every drive is almost unheard of. But they reply that MF is just a game. I told them not for me it's a hobby. So,they wanted to play that an engaged defender can't make a tackle. I told them it would be TOO lopsided for the offense. Then I suggested front of base tackling. I guess we are going to have to experiment. Keep the responses coming.