Hmm..
In online poker i find this is a bit different. the ak situation. Depends also on the buy in from that tourney. If you are playing low limit tourneys or average buy in tourney, then you also know that many of these players in the beginning will start out very loose to get an early lead in chips. When you are first to act and make a small raise, get reraised by an other player then i would usually flat call this. Most of the time you will have the best hand preflop so early in this stage considering all those maniacs in online poker.
But yes, you are right. AK should be played very carefully. I agree. But in this situation you could see the flop and control the pot size. If you are in position then this is a good reason also to flatcall his reraise. Changes are he might me raising with weaker ace or small pocket pair like 77/88/99. Just wait for his action on the flop. If he bets way too big AND fast then and you've hit your ace or king then you can pick up the pot right there most of the time as well.
A great way to spot a potsteal is (when this occurs): If you see that he bets the size of the pot very fast (like he was already planning to steal that pot no mather what, eyes are fast and a computermouse too) then this is a strong indicator that he has absolutely nothing OR a weak underpair. I will come over the top most of the time when this happens and i'll almost always win that pot right there ( but i count to 2 or 3 before doing that).
A good thing you can do to get inside his head is the following: Place yourself behind your opponents computer. Imagine yourself doing the very same thing. You see the flop and imitate his actions at the very same speed with the same clicks he made. You will see in this situation that "you" feel like you are bluffing.
Problem is: Sometimes i do this but end up losing the hand. Some players are there to gamble all the way and they have enough bankroll to enter another tourney right after that. If you are out of position then you can do the same. Check and see what he does after you(even when you have hit your ace or king).
But in the long run, you'll take his huge flopbet most of the time and your stack went up nicely. Now you can see more cheap flops with marginal hands in hope of hitting a monsterflop while you have the idea that: everything above my starting stack in this first round is playmoney to see free flops in the beginning. Or you can continue to play the same. Either way is profitable after that.
but yes, i agree once more. Folding AK in the very early stages is not a bad play at all. Depends on the situation, type of tourney and player history hands. In live tournaments this is a good decision for your future tourney life. You will get better situations later to pick up a pot. Not many players go beserk so early there.
I hope this was valuable and not crappy info
good luck