[Tom Bayes]

With one limper, this is an easy fold. Lots of players will (incorrectly) limp in with pairs or even two pair and you don't want to face a possible raise from the blinds with 77.

If everyone folds to you in the button, I'd probably muck in a cash game unless both blinds were known to fold too much. Most players call too much rather than fold too much. In a tournament, I might try to steal blinds with this hand once the blinds are large enough, especially if the blinds are too tight. However, this is a very player-dependent situation and I'm not doing this against unknowns, tough players, or stubborn blind-defenders.

My experience is that blinds are generally much easier to steal in Planet Poker tournaments than in 24h tournaments. Good players will know you are expanding your raising range and will play back with less than usual and maniacs will play back (sometimes with a worse hand or just a draw) because that's what maniacs do.