Why cry about it?  I lost 2 there as well because of M address.  Yeah it sucks but move on.  Life too damn short to cry about a few LTC.  Hell i even still mine there.  Everything works like a champ other than M addresses.  If he logs in on magical day and sends us LTC great, if not then oh well caulk it up to experience, and not knowing.  All the LTC is still in the account so it's either lost (as he can't get in it), the dude is dead thus lost or something like that.  If he was scamming you would see that stuff moved out of that account.

Plus another poor bastard just got M addressed.