How many people noticed she used the abbreviation "ur" on her reply?
I'm slightly inclined to believe that she made a typo on typing "your".
Anyway, it's pretty sad when people resort to threatening game makers with the Police.
And I don't know how she could have turned from so horribly stupid after reading your first reply.
Her first message seemed just as a concerned mother, who wasn't comfortable with the idea, but clearly doesn't realize how multiplayer games work, and then you send her a completely normal message, with perfect uninsulting information on how to fix her problem to the best of the ability available, and then she suddenly becomes agressive and more interested in being right than actually fixing her own problem.
Maybe if she just questioned nicely why it isn't possible to fix the problem, then she would have learnt what she wanted to know and could make a rational decision.
People demean themselves too soon when told they're wrong.