Well, if I was the employer, i'd like my employees to come to me and tell me that they have better offers and discuss possible course of action BEFORE accepting

Well, if I was the employer, i'd like my employees to come to me and tell me that they have better offers and discuss possible course of action BEFORE accepting any offers, rather than just accept the job and leave. This way if I want to make a counter offer, it gives me a chance to do it, otherwise I might admit I can't match the offer and wish him best of luck, no hard feelings.