Yes, I know that now. My point is that showing moderate aggression against the fat stack is not going to get you anywhere. 99 and AQ are nice hands but not in the face of a raise from a stack that is larger than yours, particularly when the stack is fat not because they've won some big pots but because they've won a lot of small pots. The temptation is to 'teach them a lesson' by getting your chips in with the better hand, assuming that they 'must' fold but it doesn't always work like that. The big stack will often call despite the pot odds because they feel they can't be seen to turn down action no matter what cards they initiated with.
I suppose it comes down to each individual's philosophy of tournaments. At first, I used ring game tactics, like re-raising the fat stack with 99 or AQ but if i've spent a couple of hours building up a nice stack, it seems a shame to waste it on small favourite/massive dog confrontation with a larger stack.