Barbs are XP huts,they can help you get HE on Monarch+ and they are not that bad if you know how to fogbust. You don't even need GW.
I normally play with barbs on, but after a couple rainforest maps where I was looking at 1 axeman and 1 spearman appearing every three turns on my borders, for about 20 turns, I opted for a barb-free next game.
When you have 3 cities, no production, and HUGE multitudes of barbarians, its nice to have a game where you don't lose a settler in the jungle because it only has 3 archers protecting it.
...
But as for being a protective civ, ick. least favourite trait.