I think smooth calling depends on your read of your opponent.

The ONLY time I'll smooth call a large pocket pair like that is in late position AND late in a tourney when things are very very tight. The table has to be so tight that a preflop raise of any size folds the field.

Reason number #3, I did this 2-3 days ago

Late on the final table of a MTT, 5 people left. I catch AA in the SB. It it folded around to me, I have a TAg to my left. I'm in the small blind, but he's not defending his blinds very well so I decide I need him in the hand. I limp in and he checks.

Flop comes down T92 3 suited.. Perfect flop for my aces.. I check, he bets about 1/3rd his stack. Ah, love when I know they will bet. I smooth call the bet.
The turn is more trash, I check, he bets about 1/2 of what he has left.. At this point I feel I have him pot commited and can make the check-raise.

He calls and flips top pair, river is a blank and he's gone.

Out of being dealt AA proably 1,000 times I think i've only been in a position where I can get this to work 5 times?