Consider the following tournament scenario:
1. You are in middle position with a pretty good stack (which is to say, not short stacked)
2. You get a few limpers on your right
3. You have an Ace with a middle kicker or a suited King and middle kicker
A good strategy is to go all-in. This gives you a good opportunity to steal the blinds and all those bets that limped in before you. As for the people on your left, they'll want to steer clear because the pot odds don't make it worth it unless, of course, they have a high pair or big slick. When I am considering this play, I pay attention to the people on my left, to see if there are any indications that they have a hand worth keeping.
Suppose I'm in the fifth seat, blinds are $5-10 and two people limp in in front of me. There's $35 in the pot. Suppose I have A-9 and a $175 stack and raise all-in. The action comes to you and you're holding 8-8.
Do you want to make that call? Sure, you're a 3:2 favorite, but is that enough for you to risk your whole stack? And besides, what if I really have a higher pair, or someone else to your left has a better pair? Then you're really in trouble.
I used this play a few times during Game 11, much to the frustration of the people on my right. People knew I didn't have a made hand, but neither the blinds nor the limpers wanted to challenge it. It just wasn't worth it.
In fact, in one instance I did this with A-9 off-suit. The all-in bet pushed Jeff H. out of the hand, and he was on the button with A-10. So, when used correctly, the system works. Give it a shot next time you have th opportunity.