Make a great trellis
Nail it between two poles or stick tripods, then you can drop strings down to like beans/peas/cucumbers/japanese melons what not in the garden. You can hang pots from it, or stick pots up there on the top (use best judgment there on weight and spreading it out, etc and what to use for potting soil...)and wire them down, and do tomatoes for "upside down" tomatoes. no further anything is required to do them that way, they just hang down, makes it easy to harvest.
I've taken individual bent or damaged ladder sections apart, from a sliding extension ladder, straightened them by running over the hump with some boards over it**, (and maybe some boards at the ends under it to give it more play to straighten out) then screwed stiffener boards to the sides. You have two heavier individual ladders then. You can rip some boards (like pressure treated 1 x 4s) that will snug up inside the rail section on the side, so they fit tight inside the little lips there. Pop some holes, bolt them down. I've used them just like that, your call if you want to and won't advise you to of course.
**I straighten bent corral sections and gates this way as well, with the tractor for weight...doesn't come out perfect, but they can be put back into service then.
try this as a search string "upside+down"+tomatoes
it's slick and old ladder sections would be good for it
Or, you can just take them to the scrap yard along with your stash of roached pistons and cylinders and so on, turn them in for some cash, see if they have any saws there for cheap....me, I'd do something with the ladder sections. I try to repair/repurpose/reuse stuff all the time. I've never made enough to willy nilly chuck stuff out and go buy all new again. In fact, I buy very little new anything, by the way of durable goods. Some, but not much. recent new chainsaw and fiskars tools being rare exceptions.
