I always play with raging for all the reasons already mentioned, and 1 more besides.
If I have difficulty at the beginning of a new era with massive uprisings, then the AI will also have the same problems. Multiply this by the number of civs that you are up against, and this gives the player a distinct advantage.......since we will plan for the uprisings and, hence, be more prepared to fight off the onslaught.
I also like growing barbarian farms. If I can get a good sized desert area that I can keep the AI away from, I'll grow my own barbarians. There is no way to domesticate them, but they do serve as great target practice or my troops.