I'm sure we'll see a lot of those, but it was already happening though in a different way. A few days ago I was running Castrum Meridianum with a bunch of first timers, and one of the tanks already had a few pieces of Darklight and then started to insult the other tank for wearing AF. We can already see shouts "LFM for X! Must have full Darklight and Ifrit weapon or better!", item level will just change all those things into a single number.