I did something ridiculous lately, but got lucky. Watched a couple pre-flop raise at $1/2 NL to about $12 consistently. Every time, they'd show crap like 62o and never mix it up. Re-raised them, and they'd fold.

A few hands later, I turned around and raised with 73s to $7 in MP after about 3 folds while one of the bluffers was BB. He and SB called, but I got lucky when the flop came 833. Took down a big pot as the SB called me down to the river where I caught a boat.

The second example was really just luck, the first one is more of something you could do if you suspect someone of being more risky and playing worse hands for raises. Act like you've got the best, but if he comes back over the top, you very well may be beat. Then just let it go.