If a mod deleted posts that were in the database, it would take me approximately six minutes to restore it from a backup, assuming that the posts deleted were not made since the last backup. I'd just have to restore one entry in each of two tables.

And if a mod did abuse their power, they would be quickly de-modded, which is why none will. It's not exactly easy to get onto EoFF's staff (anymore), and once someone gets in, they don't want to lose that, usually.