I was just thinking about this today when a Black Phantom came into my game while farming in Arno Londo and I backed up my save file again for 13th billion time. People were previously talking about how it would be hard to implement an easy mode, but why not implement something akin to Terraria's Softcore, mediumcore, hardcore modes?
I have to say that Dark Souls seems a lot more enjoyable when I don't have to worry about losing all my stuff from getting invaded while farming, and it's not like the guy who invaded is losing out on anything anyway (though if they do implement a softcore mode they probably should take into account the guys playing softcore aren't going to be good challenges for pvp oriented folks and therefore give less of a reward for defeating them.)
On a side note: what is with all the elemental weapon users? The attacks do so little damage and they don't seem to know how to back stab or even parry...