"This is fine because Lineage 2 had horrible PVP consequences" is a fallacy. Of course, I just appreciated the infamy system earlier when I saw two level 36 characters camping the bridge out of lumbertown and they were eventually overwhelmed and slaughtered. Still, I can picture those two finding like minded people and abusing the infamy system.
If they don't want high level characters ganking and camping low levels, they can just make it impossible to target low level targets in PVP, but that would add other issues as well.
You deserve to be a target if all you do is kill lowbies. Get some [filtered] balls and fight someone your own level or go play PVE since you are too bad at PVP to do anything but kill lowbie noobs.
Sure there may be exceptions here, such as the dude who got butt raped by a bunch of guys on his lowbie, so he got revenge... that's awesome btw. The system generally works though.
Don't want infamy? Stop being a douche then.
You shouldn't have killed the lowbies if you don't want infamy. 8 channels for a reason.
Dark Age of Camelot - Mordred; had it right, nuff said.