In an editorial several years ago, I described a tree house in the backyard of a local restaurant. I wrote, “The entire structure has been pieced together from recycled lumber, much of which still bears the paint, logos or posters of the original walls from whence it came. The generous platform is ringed by a sturdy fence that includes branches of the tree itself, random two-by-fours, wooden signs, and even a pair of moose antlers. The ‘house’ is more of a lean-to, tall enough for kids (but not adults) to stand up inside, with a screened door and two screened windows positioned so occupants can easily spy on the diners below or out over the adjacent parking lot. A green padded bench that looks like it had once belonged in a diner adequately furnishes the space. Underneath the tree house hangs a rope swing, from which kids can fling themselves into a thick layer of hay on the grass.”
Fast forward to this summer. The restaurant revamped their backyard, including the tree house. The railing now consists of uniform boards about three inches apart. The house is reached not by a ladder and trapdoor, but via a bona fide staircase. The screen door is...