A decent refrigerator should consume less than a kWh per day, perhaps 1.5 kWh/day for refrigerator + standalone freezer - this is something that has changed over the last couple decades, at least in the EU there has been a strong push towards more efficient appliances and refrigerators consume much less power than older models.
This does not make it more likely that someone is stealing their electricity than they have a refrigerator and/or freezer making up the rest of their unspoken for electrical bill.
