Well, no Cyber World, no this forum. Technology needs someone to use it. Affairs, broken marriages and parading OW/OM in town have been around for millennia (think Julius Cesar taking Cleopatra to Rome - ok, those people had fixed marriages and did not expect a faithful spouse, but taking her to Rome was a bit too much even to the all tolerant romans).
If a person is up to an affair they will get it, technology or not. Technology, if tehy are using it in a careless way, just makes it much easier for us to see what they are up to and to them to show themselves to a larger audience (FB, for example) in a shorter amout of time.
But it is upon the user to be responsable for the use they make of technology. Agree with BNW, it is a question of moderation. And common sense.
Sometimes good things fall apart so better things can fall together. (Marilyn Monroe)