Just a guess, but it’s probably just because the person would end up throwing a tantrum. “YOU CAN’T ARREST ME! I’M BEING ARRESTED! I DIDN’T DO ANYTHING WRONG! WHERE’S YOUR PROOF!” (Or something like that.) As anyone around them tries to ignore the guy shouting at the top of his lungs and trying to do his best not to get handcuffed.
Just a guess, but it’s probably just because the person would end up throwing a tantrum. “YOU CAN’T ARREST ME! I’M BEING ARRESTED! I DIDN’T DO ANYTHING WRONG! WHERE’S YOUR PROOF!” (Or something like that.) As anyone around them tries to ignore the guy shouting at the top of his lungs and trying to do his best not to get handcuffed.