Agreed with Panda.
My father never hit me once, yet his voice was enough and when he said no i knew he meant it. My mother on the other hand used to hit out quite alot. and when i think of it now it was a beating rather than a hit, i wasn't scared of her and i often chatted back.
If i child is going to stick their finger in a socket a slap to the hand and a shout is enough, and excluding them from the group by making them sit alone or in their room is enough. If to control your child by fear is what is needed, then i think you need to look at yourself.