I did this, and I lost my entire /bal and all my towns, also reset'ed my enderchest and inventory. I highly suggest people not to use this method. -1
It sounds like this was due to inactivity, and unrelated to the 'method'. If you farm a lot of experience at one time and plan on converting it all into enchanted items, you really should temporarily store your experience in signs (each sign holding 30 levels, or 825xp) so you can get the maximum number of enchants out of your exp.
Whatever you do, DO NOT use spruce planks. It took me 3 hours to clean all the blood off my keyboard.