What's even scarier is when you carve your jack-o'-lanterns a couple of weeks too early and a spate of unseasonably warm weather makes them get all gross and soft... so now you've got a bunch of wrinkly old-men's faces grinning emptily at you from someone's porch.

Or, like, you've got that one neighbor who leaves his "punkins" out for weeks after Halloween is over. [whiny female voice]
"It's December 18. Throw those things away." [deep Southern male voice]
"Hey, you kiddin'? All 'at green 'n' red mold on 'em jacky-lanterns makes it looks all festive an' Christmas-like." [female gives out a Marge Simpson-esque groan]

Where are mall-walkers going to walk when malls are closed in the future?
Dead malls often sit yawning empty for months or years, so unless they're cordoned off you can still walk about in them, even go into abandoned stores to forage for goodies (though in some areas authorities might discourage trespassing or entering decrepit, dangerous structures). Eventually they raze the whole shebang for "green space" or a
business park (which is really a misnomer, as there are no swings or rides, just dull buildings full of corporate offices and files).