I also cannot drop the "Magical Device" to complete a quest called "Carson's Experiment" (which is mandatory for a quest line), nor can I drop the Piece of Cracked Dimension needed to fight Papulatus.
Oh, and that Papulatus quest also requires another item, which much like the three I mentioned, I cannot sell or store. Along with some other stuff, these are seriously clogging my inventory, making gameplay rather frustrating.
Again, all I did was buy one stupid Gachapon Ticket, so why is this game penalizing me for it? Does dropping trash items really cause a hacking risk here?? Security is one thing, but this is beyond ridiculous.
As for "combat fraud", please. I still see the same problem with botters that i saw here six years ago. They even use the same methods. I report them, by the way. Even if one of them is banned, he'll be back with a new toon in a week. These "security measures" aren't working very well if you ask me.