Problems with 2002 Jeep Wrangler FUEL SYSTEM, GASOLINE

I was driving on the palisades parkway going about 60 mph and the accelerator pedal stuck and would not return to idle. i was able tp pull to side of road and shut vehicle off. when vehicle was restarted the idle was over 4000 rpms. i am an ase certified mechanic and on inspection found the throttle body seized open. throttle body will need to be replaced. this could have been very serious if traffic was heavy or an inexperienced person was behind the wheel. *tr

Last night a fire truck (hook and ladder) showed up in my driveway. i went out to see what was going on. as i walked out the door i noticed three firemen looking under and around my 2002 jeep wrangler. when i asked what was going on the firemen indicated that there was a strong smell of gas reported by on of my neighbors! turn out the smell was gasoline and was indeed originating from my 2002 jeep wrangler. we brought the jeep into the shop and the dealership was able to diagnose the cause and informed me that there was a solenoid purge value associated with the fuel system that went bad and when this happens the excess fuel is discharged out the exhaust system and that was what we were smelling. the failure of this component causes the vehicle to run rich, foul spark plugs, reduce mileage and yes, there's the concern over the excess fuel, not to mention the "check engine light" was also now on. the jeep has ~32k miles and is now past 3 years (3yr/36miles) however we purchased the "extended warranty" which as it turns out does not cover this failed component. cost $180.00 to us. my concerns: 1. fire hazard? the smell was very strong! strong enough to warrant a visit by the local fire department! 2. fuel economy....$2.15/gallon for 87 octane 3. environmental concerns? the way i understand it is the excess fuel is routed straight out the exhaust system! do i really want to go off reading with this vehicle spewing excess gasoline out the exhaust as i take in the sights and sounds of the road less traveled? my question: is this component failure common? is the failure mode environmentally friendly? are there any concerns to my well being in the event we have a recurrence? has anyone seen this before?

At start up, vehicle shakes and sounds like injectors are missing, not taken to dealer yet. *ak vehicle taken to dealer 3 times, however dealership cannot duplicate problem. vehicle boggs and runs rough/hesitates when cold. rear portion of soft top located near bottom of tailgate has gap. rear weatherstrip adjusted. *tt