They could do coded masege. Like drop down menu with some options, hour date and rsn. Like you get. I will be in game at 12h 12.4.2004 to XXX I would only get that option to frend list, so there would not be spaming and for code you only need show mesege 1, 2... date. So we can know when we are in game. I realy have problems with frends that rerly play. So that he or me could inform when he will be on. And mesege could disapere after the inform date. Taht is simple and useful for frendship. There could be some more lins so that it keep simple. And you could look at info at start list. And there should be some limit like 10 or 5 meseges and also max 5 displayed on that screen and like more on forum. And like time limit to 1 month in forward. So that there won't be spam.