How regularly did things like this appear in the game?
Every five minutes. It almost ruined the game.
Ouch, that does sound very over the top. I mean, I don't mind occassional humor (anybody remember the spectator beholder from Baldur's Gate II?) of the game not taking itself seriously, but if it appears too often, it would ruin the experience for me.
Only it wasn't a talking radscorpion. It was a lockpicking, chessmaster radscorpion.
Well, yes, it is a matter of taste. Personally, I can find over-the-top humor amusing if it is used sparingly.