When the latch wears out you can buy a new mailbox, or you can glue in a harddrive magnet to hold the flap shut. Should be fine as long as AOL doesn't mail out anymore floppies.
A few notes:
Clearly, we can add vinyl records to the list of materials wood glue is used for.
I've never found a spray glue that doesn't wear off in a matter of days.
Just like this chart, I absolutely swear by the power of hot glue. I recently used it as the only adhesive on my Halloween costume and it held together superbly.