Shall we let her/him go? another aspect

Yesterday when I was browsing the internet I found an intersting article in which the author complained about those who just leave a realtionship or friendship without any further explanation of why they are not intersted to continue. I think the author was right. If we are not intersted in our relationship/friendship with somebody we should tell that person why we don't want to continue and not responding to text messages, IMs or emails looks childsish and not reasonable reactions. We are not allowed to make people suspended. Remember the moralities!