Ask anyone from Ford, and it happens rarely, the issue is blown out of proportion.
Ask anyone in the real world, actually driving the trucks, it happens to almost everyone.
Seems like it's a fairly common issue on the 00-02 2v's, both the 4.6 and 5.4. Some had a plug blow at 70k miles, others well past 130k. So I guess keep your fingers crossed that it won't happen soon or maybe it already has and the previous owner(s) has already dealt with it.
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.