Pre-EPA 'energy-slasher' programs, the refrigerator outlet in trailer kitchens had very high odds of the first to go if poke wired.
It is probably not the case with local enforcement, but UL and national codes cannot summarily prohibit poke-wired devices. They just need to write testing procedures to flush out terminations that crap out too easily.
Offhand, NRTLs can be somewhat political in their own right—as mediators between commodity-level building-materials sellers and construction-enforcement folks [AHJs.] At times, the investment by and safety of the end user is only superficially of any consequence.
