Three-bet pots are more "honest" than single raised pots.
In low stakes games, if a pot has been re-raised and called, you should give the caller credit for having a strong hand. For instance, if a villain calls a 3bet preflop and then continues on the turn, they probably have a hand they really like (relative to the board texture) and want to at least see a showdown. Bluffing and floating by this player is less likely once the re-raise and flat has occurred. Yes, it does happen, but less frequently than in normal single-raised pots. It's also very hard to get this type of player to fold. Be wary of the ABC opponent who flats a 3-bet and then doesn't go away.
All-in for now...