You should fold this MAYBE if you drove 6 hours to enter this tourney and if you don't make it ITM you can't buy gas to get home.

In which case, you should get a job, you bum.

In an online tourney - just start another one.

You can fold KK here. Not AA.

In the general case - you are not making a distinction between marginal odds in your favor and big odds in your favor. You are getting 5:2 odds IN YOUR FAVOR to call here. Also, in a ring game, you should technically make all +EV calls, no matter how marginal because you can rebuy. If you can't rebuy (or in first example, buy-in to another tourney) they you need to move down limits.