I've been using ds' development as my lead. As soon as he was mobile we put covers on the electrical outlets & moved things out of his reach. When he showed interest in going into the kitchen all. the. time. to play with the dog's water we put a gate on the kitchen. Now that he will NOT leave the stairs alone (wants to go up all day long) we put a gate at the bottom of the stairs.
Some babies do need more childproofing then others, whether because of their personalities or the level of supervision available. I don't know anyone who needed to use toilet locks or fridge locks or secured their furniture to walls, etc. But I'm sure there are some people who have needed to, even if it is just for their own ease of mind.
We have a baby gate on the stairs, mostly to corralle her into the living room area, so I don't have to chase her all around the house, and same for the kitchen. (She likes to play with the dog's water, and toss toys into it...We lost a Playstation controller that way...ack!!!)
I have the cleaners, meds, etc in a place she can't get to, not that she has ever tried. But I do not have toilet covers or stove locks, becuase she's never in the bathroom or kitchen, and can't get to them the way my house is set up. And even when she is in those rooms, she has never shown any interest. She knows the stove is hot, and should never go near it, and doesn't really show much interest in the potty as of yet.