I dont understand why it would upset anyone. There are a huge variety of reasons one might delete their account,perhaps they felt the site was too much to handle then got a chance to think about the good aspects,or thought they were moving and that fell through.Ppl with mh issues are unstable and need some understanding in regards to their ability to rethink a decision to leave and come back when things mellow out in their heads.Why does it bother you so much?