First off, i would not report or cry about this, but since it is here, i want to put my 2 cents worth in, and this is no attack on the person in question, this is a general observation about account sharing.
Sharing accounts even if its only a brother or another household member is ( IMO ), still a form of cheat. In this game is not as big of a deal, but when more than one person is playing, it is allowing advancement at a more than normal pace.
Where should the line be drawn, 1 brother that plays here n there, 2 siblings? or mabye a colledge dorm, where someone is able to play round the clock? see my point?
Its easy to create an account,all you need is an email account. Oh i know, then the sharer and sharee, wouldnt be able to pool their ap together. On the other hand, in 4+ yrs here at AG, i have heard of countless accounts being lost, because of this. freind shares with freind, other freind shares again, and bam, account is gone. then this creates more work for GM's to straighten the mess out, that was created by the user in the first place.
again, just my opinion.