God does not indiscriminately relieve of us from experiencing the consequences of our actions. Like any wise parent, he knows it is often best that we experience the results of our choices, even when they are unpleasant. Fortunately, even when we sin God tempers his judgment with mercy. He does not treat us as our sins deserve. But Christians must never trifle with sin.
All sin has very real, and sometimes long lasting, consequences.
There are repentant former drug addicts and sexually promiscuous Christians who turned to God, repented, and believed in Christ. Yet, despite the exercise of saving faith, many continue to experience the side-effects from their former lifestyles in the form of AIDS and other diseases. Violation of God's moral laws always has negative consequences. Subsequent repentance will not always free us from the residual results of disobedience. Christians should never be careless about sin.