How do I dispose of used sulphuric acid?

Sulfuric acid is indeed a great way to dispose of meat, though pigs are more efficient. Not all of us have pigs though. The most important thing is to make sure you dispose of it at night, preferably in an extremely low-traffic area. Wooded areas are really best, and if you can find a nice hill to roll the barrels down, you will save yourself a whole lot of trouble. If you do decide to dispose of the barrels as well, be sure to use gloves and bring a few rags with which to wipe away any fingerprints.