Especially when you, umm, shut down the anchor store in said mall. I'm thinking of the Overlake Mall in Bellevue, WA that I pass every day, with its now-closed Sears store: "well, who the hell would want to rent retail space in there now?" Even when the Sears was open, I'd be hard-pressed to tell you the last time I was in that mall.
I'm sure there's some weaselly real estate one weird trick that us commoners are missing, but it sure doesn't make a lot of sense from where I'm sitting.