Regarding the Radium and the Diona:
Given that the mechanic of "radium heals 20 points of damage per unit processed" was requested by a former diona lore writer and intentionally added, I would not consider the usage of that mechanic as "Bug Using" / "Abuse of Mechanics", as the mechanic has not been used outside of its intended function. (However, this mechanic is being removed as a direct consequence of this incident.)
If you got warned for it, it is possible to pull the logs, as the date/time is saved with each warning.