The only time I would ever limp utg w/ KK is if I knew the pot was going to get raised. At a live tourney one time a player was raise pushing pratically every hand. C-bet shoving so here it made sense and other situations like it. Also another time I did it I managed to get away from the hand with less money involved preflop when a super nit player. Raised and reraised me after I repopped him. I folded my kings face up and he smiled and flipped over his aces. Then the table got quiet