E=Emergency, the e-brake is also commonly refered to as the parking brake. And no you don't just jam it in park, because if you do you will shear the parking pin basically putting you in neutral, and if you survive you will have to take the transmission apart to fix the parking pin. Driving with out a e-brake is extremely dangerous and not recommended, not to mention the liability of not having one. It provides a mechanical link to you brakes if your hydraulic brake system fails.
2003 Jeep Wrangler Rubicon
4.0L, 42RLE, Dual Tops, Full Doors, JKS Front Disconnects, Cragar Soft 8 Black Wheels, 33x12.5x15 Goodyear Duratracs, .75" Front Coil Spacers, Bushwacker 6" Flat Fender Flares, Skid Row Steering Box Skid, LubeLockers, Rubicon Locker Mod, OBA, Cobra 19 Ultra III CB, 3' Firestik, Rough Country 2.2 Steering Stabilizer, RC 1.25" BL, RC 1" MML, RC Grab Handles, Fog Lamp Bent Pin Mod, 4" Apline S Series Speakers, Kenwood Excelon 6.5" Speakers, 6.5" JL Audio 6W3V3 Subwoofer (in center console) w/MTX Thunder 202 amp, IPF H4 Headlight Housing, Sliverstar H4 bulbs.
TJ Tech Boot Camp
"Buying a jeep and not taking it off road, is like buying a dragster and never taking it to the track"