The thing you have to remember, is that on a loose table people play any ace. In early position, it's a losing proposition to continue with KK on an Axx flop at a loose table. Especially with more than 3 people to the flop. Someone will have it. Some douchebag will go in with A2 offsuit for a raise and then call you down like no tomorrow.

In late position seek a cheap showdown by raising the flop if any bets take place that seem less than completely confident. In early position check/fold unless you can put a bettor on less than an ace.