We have kids. We rarely have crisps in the house though, (I can actually leave crisps alone anyway, unlike sweet stuff), the kids are actually not interested in biscuits, so we don't have them, and if they have chocolate, its on a Friday, they eat it same day, so we don't have to have it around.
My OH eats crisps and other junky stuff (he is a natural skinny) but he tends to buy it and eat it straight away, mainly during the day at work, so I don't have his junk calling me to eat it!