i would imagine that if catchers had the same value to the MLB that QBs have to the NFL, they would disallow any crashing the catcher at the plate. as is, they are not.
MLB is notoriously attached to/steeped in, its "heritage"/"history"/"tradition" and often times to its own detriment. and i cant imagine the play at the plate not falling into that description. its beloved by many, its very exciting to watch, its not a play that happens terribly often, so when it does it gets the fans pumped. its "part of the game." and just wait for some stat head to be all like "how will we keep records of catchers before and after the play at plate? do we need an asterisk?"
i personally like the play at the plate, but i understand the danger involved, and could understand the reason behind doing away with it. but considering MLBs overarching value set and the value placed on catchers, i find it highly unlikely.
as an aside, ive been a very casual baseball fan the past number of years, and really tune in only during playoff time. so im really not familiar with all the players like i used to be, as a kid. i had no idea who the this napoli dude is, but man he is awesome. is he always this good, or was last night an above average game for him? obviously the beard gives him extra stitch point.