If he has an established relationship, yes. But if the mother is just trying to pawn off the child onto a man who isn't the father either biologically or legally - then the man shouldn't be forced to pay child support. Its one thing if he acknowleges the paternity through his actions. Its another thing if he's duped into raising a child he has no certainty that is his own offspring.
"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus