Sway bars are useless for leaf sprung rear ends, alot of xj's didnt even come with rear sway bars from the factory.

 

A friend of mine took his off and didn't do what you just said. That day was a sad day for his poor jeep

 

The antisway bar only controls body lean. It does so by limiting axle articulation.

In controlling body lean, understeer and oversteer is affected. If you stiffen the front it will tend to increase understeer. If you stiffen the rear (or loosen the front) it will increase oversteer.

Other than the steering characteristics, body lean will not increase the tendency for vehicle rollover. The antisway bar does not change weight transfer... weight transfer is the main factor behind rollover. A common misconception about antisway bars is that removing them will make the vehicle easier to roll over. This is absolutely untrue. The only way to increase weight transfer is to raise CG or narrow the vehicle track.

If your Jeep is high enough it might want to roll over before you get to the traction limit of the tires, in which case the antisway bars are solely controlling body roll and you can get rid of them without decreasing safety.

If on the other hand your Jeep is stable enough where you can plow the tires, be careful about removing the front antisway bar because it may cause the Jeep to fishtail more easily.