The Toyota oil sludge settlement... Toyota fought it for years, blaming owners. It was several model years, not just MY99. Something like 4 million vehicles affected, if memory serves.
IIRC, the problem came about because Toyota engineers narrowed block and head cooling passages to raise transient combustion chamber temperatures in the interest of more complete fuel/air charge burn. That raised the overall cylinder head temperature over time, and they failed to account for the fact that there is always some motor oil pooling in the nooks and crannies in the top surfaces of a head. So it got fried and turned into clots, which eventually circulated.
They made a fundamental mistake - you address head drainage/cooling when you raise head temps. That's pretty much Motor Design 101 stuff...
Re this sticking throttle problem: Will CBS's "60 Minutes" have a feature, like they did with the Audi 5000 years ago (unintended acceleration - turned out to be operator error, but CBS saw fit to jury rig an Audi for their show), or the GM pick-up gas tank problem (they put pyrotechnic devices that would explode when they staged a crash, to insure that the truck went up in flames)?
Nah.