Honestly I didn't read the OP (but I'm familiar with this situation). This whole situation is laughable. You're not going to convince me to believe that some teenage Graal girl "hacked" the guild away from someone. Therefore:
- The account was shared and she took it that way
- He sold the guild and this is his shameful way of not letting down members
- It was given away, by the owner or administrators, for some other reason
At the end of the day, only an idiot or a dishonest person would lose a guild.