[yecul]

This is definitely the in thing to do in the middle/latter stages of a tournament. Sometimes it's very obvious, for example if an aggro limps in EP.

You can use it to your advantage too. I limped with 99 as an average/somewhat short stack UTG. There were 1-2 callers, a raise, and I push. They all fold and the raiser says "AA, right?" as he dumps it.