...and I am the guy who verbalizes that: Please keep in mind that pellucidity and conciseness are paramount for efficacious communication. Thank you for expounding the technological aspects in a way that is understandable to those who may not have the same level of expertise as yourself in this field.Not to be THAT guy again, but you do realize that being 'online' doesn't actually mean he is back. If he has no activity besides being online that could just be a bot, or his cookie getting renewed either by an automatic browser script, or him having this main website tabbed open somewhere in the PC and the PC itself just refreshed after a hibernate. Heck it may not even be him but someone in his family.
Hurling stones before you understand the reasons, is not fair.